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aad laad forms.
Classifica too of
of land forms.
1. The plain or gently inclined uniform surface.
II. Rumpfgebirge 'oder Abrasionsgebirge-Trunk or abraded 2. The scarp or steeply inclined slope. this is necessarily of
mountains. small extent except in the direction of its length..
III. Ausbruchsgebirge Eruptive mountains. 3. The valley, composed of two lateral paralle! slopes inclined IV. Aufschüllungsgebirge Mountains of accumulation. towards a narrow strip of plain at a lower level which itself slopes V. Flachböden-Plateaux. downwards in the direction of its length. Many varieties of this (a) Abrasionsplatten-Abraded plateaux. fundamental form may be distinguished.
(0) Marines Flachland-Plain of marine erosion. 4. The mount, composed of a surface falling away on every side (c) Schichtungstafelland-Horizontally stratified tableland. from a particular place. This place may either be a point, as (j) Übergusstafelland--Lava plain. in a volcanic cone, or a line, as in a mountain range or ridge of le) Strom flachland-River plain. hills.
Flachboden der almosphärischen Aufschüllung-Plains of 5. The hollow or form produced by a land surface sloping inwards
aeolian formation. (rom all sides to a partirular lowest place, the converse of a mount. VI. Erosionsgebirge--Mountains of erosion.
6. The cavern or space entirely surrounded by a land surface. From the morphological point of view it is more important to
These forms never occur scattered haphazard over a region. distinguish the associations of forms, such as the mountain mass but always in an orderly subordination depending on their mude or group of mountains radiating from a centre, with the of origin. The dominant forms result from crustal valleys furrowing their flanks spreading towards every
movements, the subsidiary from secondary reactions direction; the mountain chain or line of heights, forming a
butions. The geological structure and the mineral com. the dissecled plalecu or highland, divided into mountains of circumposition of the rocks are often the chicf causes determining the denudation by a system of deeply-cut valleys, and the isolated character of the land forms of a region Thus the scenery or a limepeak. usually a volcanic cone or a hard rock mass Icft projecting after stone country depends on the solubility and permeability of the the softer strata which embedded it have been worn away (Monadrocks, leading to ihe typiral Karst-formations of caverns, swallow- nock of Professor Davis). holes and underground sercam courses, with the contingent pheno- The geographical distribution of mountains is intimately associated mena of dry valleys and natural bridges. A sandy beach or usert with the great structural lines of the continents of which they form owes its character to the mobility of its constituent sand-grains, the culminating region. Lofty lines of fold mountains which are readily drilled and piled up in the form of dunes. A form the " backbones " of North America in the Rocky
Distriburegion where volcanic activity has led to the embedding of dykes or Mountains and the west coast systems, of South America
mountains. bosses of hard rock amongst softer strata produces a plain broken by in the Cordillera the Andes, of Europe in the Pyrenees, abrupt and isolated eminences'
Alps, Carpathians and Caucasus, and of Asia in the mountains of It would be impracticable to go fully into the varieties of each Asia Minor, converging on the Pamirs and diverging thence in the specific form: but. partly as an example of modern geographical Himalaya and the vast mountain systems of central and eastern
classification, partly because of the exceptional import. Asia. The remarkable line of volcanoes around the whole coast ance of mountains amongst the features of the land, one of the Pacific and along the margin of the Caribbean and Mediter
exception may be made. The classification of mountains rancan scas is one of the most conspicuous features of the globe. novotalas.
into types has usually had regard rather to geological If land forms may be compared to organs, the part they serve in structure than to external form, so that some geologists would even the economy of the earth may, without straining the term, be apply the name of a mountain range to a region not distinguished characterized as functions. The first and simplest
Functloos by relief from the rest of the country if it bear geological evidence function of the land surface is that of guiding loose of having once been a true range. A mountain may be described material to a lower level. The downward pull of gravity (it cannot be defined) as an clevated region of irregular surface suffices to bring about the fall of such material, but the rising.comparatively abruptly from lower ground. The actual path it will follow and the distance it will travel before coming to elevation of a summit above sea level docs not necessarily affect its rest depend upon the land form. The loose material may, and in mountainous character; a gentle emincnce, for instance, rising a an arid region does, consist only of portions of the higher few hundred seet above a tableland, even if at an clevation of say parts of the surface detached by the expansion and 15.000 (t., could only be called a hill. But it may be said that contraction produced by heating and cooling due to any abrupt slope of 2000 ft, or more in vertical height may justly radiation. Such broken material rolling down a uniform scarp be called a mountain. while abrupt slopes of lesser height may would tend to reduce its stcepness by the loss of material in the be called hills. Existing classifications, however, do not take upper part and by the accumulation of a mound or scree against account or any difference in kind between mountain and hills, the lower part of the slope. But where the side is not a uniform although it is common in the German language to speak of Hugel scarp, but made up of a series of ridges and valleys, the tendency land. Mittelgebirge and Hochgebirge with a definite significance. will be to distribute the deeritus in an irregular manner, directing
The simple classification employed by Professor James Geikie: it away from one place and collecting it in great masses in another, into mountains of accumulation, mountains of elevation and moun. so that in time the land form assumes a new appearance. Snow tains of circumdenudation, is not considered sufficiently thorough accumulating on the higher portions of the land, when compacted by German geographers, who, following. Richthofen. generally into ice and caused to now downwards by gravity, gives rise, on adopt a classification dependent on six primary divisions, each of account of its more coherent character, to continuous which is subdivided. The terms employed, cspecially for the sub- glaciers, which mould themselves to the slopes down divisions, cannot be easily translated into other languages, and the which they are guided, different ice-streams converging to send English equivalents in the following cable are only put forward forward a greater volume. Gradually coming to occupy definite tentatively:
beds, which are deepened and polished by the Iriction, they impress RICHTHOFEN'S CLASSIFICATION OF MOUNTAINS
a characteristic appearance on the land, which guides them as they 1. Tektonische Gebirge-Tectonic mountains..
traverse it, and, although the ice melts at lower levels, vast quantities (a) Bruchgebirge oder Schollengebirge--Block mountains. of clay and broken stones are brought down and deposited in terminal 1. Einseitige Schollengebirge oder Schollenrandgebirge
moraines where the glacier ends. Scarp or tilted block mountains.
Rain is by far the most important of the inorganic mobile dis(i.) Tafelscholle-Table blocks.
tributions upon which land forms exercise their function of guidance (ii.) Abrasionsscholle-Abraded blocks. and control. The precipitation of rain from the aqueous
Rala. (iii.) Transgressionsscholle--Blocks of unconform- vapour of the atmosphere is caused in part by vertical able strata.
movements of the atmosphere involving heat changes and apparently 2. Flexurgebirge-Flexure mountains.
independent of the surface upon which precipitation occurs: but in 3. Horstgebirge--Symmetrical block mountains. grcaicr part it is dictated by the form and altitude of the land surface (b) Faltungsgebirge-Fold mountains.
and the direction of the prevailing winds, which itself is largely 1. Homöomorphe Faltungsgebirge-Homomorphic fold influenced by the land. It is on the windward laces of the highest mountains.
ground, or just beyond the summit of less dominant heights upon the 2. Peteromorphe Fallungsgebirge-Heteromorphic fold, leeward side, that most rain falls, and all that does not evaporate
or percolate into the ground is conducted back to the sea by a route
which depends only on the form of the land. More mobile and more On this subject see J. Gcikie. Earth Sculpture (London, 1898): searching than ice or rock rubbish, the trickling drops are guided by J. E. Marr, The Scientific Study of Scenery (London, 1900); Sir A. the decpest lines of the hillside in their incipient flow, and as these Geikie, The Scenery and Geology of (London, 2nd ed., 1887); lines converge, the stream, gaining strength, proceeds Lord Avebury (Sir J. Lubbock) The Scenery of Switzerland (London, its torrential course to carve its channel decper and en1896) and The Scenery of England (London, 1902).
trench itsell in permanent occupation. Thus the stream. Some geographers distinguish a mountain from a hill by origin: bed, from which at first the water might be blown away into a new thus Professor Seeley says " a mountain implies elevation and a hill channel by a gale of wind, ultimately grows to be the strongest line implies denudation, but the external forms of both are often iden. of the landscape. As the main valley deepens, the tributary streamtical.' Report VI. Int. Geog. Congress (London, 1895), p. 751. beds are deepened also, and gradually cut their way headwards, Mountains," in Scol. Geog. Alag. ii. (1896) p. 145.
enlarging the area whence they draw their supplies. Thus new • Mahrer für Forschungsreisende, pp. 652-685.
land forms are created-valleys of curious complexity, for example
River systems. river
by the" capture " and diversion of the water of one river by another, I limnology (see Lake).' The existence of lakes in hollows of the land leading to a change of watershed.' The minor tributaries become depends upon the balance between precipitation and evaporation. more numerous and more constant, until the system of torrents A stream fowing into a hollow will tend to fill it up, and
Lakes and has impressed its own individuality on the mountain side. As the water will begin to escape as soon as its level rises high
Internal the river leaves the mountain, ever growing by the accession of enough to reach the lowest part of the rim. In the case
drainage tributaries, it ceases, save in food time, to be a formidable instru- of a large hollow in a very dry climate the rate of ment of destruction; the gentler slope of the land surface gives to evaporation may be sufficient to prevent the water from ever rising it only power sufficient to transport small stones, gravel, sand and to the lip, so that there is no outflow to the sea, and a basin of internal ultimately mud. Its valley banks are cut back by the erosion of drainage is the result.. This is the case, for instance, in the Caspian minor tributaries, or by rain-wash is the climate be moist, or lelt sea, the Aral and Balkhash lakes, the Tarim basin, the Sahara, inner steep and sharp while the river deepens its bed if the climate be Australia, the great basin of the United States and the Titicaca arid. The outline of the curve of a valley's sides ultimately depends basin. These basins of internal drainage are calculated to amount on the angle of repose of the detritus which covers them, if there to 22% of the land surface. The percentages of the land surface has been no subsequent change, such as the passage of a glacier draining to the different oceans are approximately-Atlantic, 34.3 %; along the valley, which tends to destroy the regularity of the cross- Arctic sca, 16.5 %; Pacific, 14.4%; Indian Ocean, 12.8%. section. The slope of the river bed diminishes until the plain compels The parts of a river system have not been so clearly defined as is the river to move slowly, swinging in meanders proportioned to its desirable, hence the exaggerated importance popularly attached ta size, and gradually, controlled by the fastening land, ceasing to
" the source of a river. A well-developed river system
Termlootransport material, but raising its banks and silting up its bed by has in fact many equally important and widely-separated
logy of the dropped sediment, until, split up and shoaled, its distributaries sources, the most distant from the mouth, the highest, struggle across its delta to the sca. This is the typical river of which or even that of largest initial volume not being neces.
Systems. there are infinite varieties, yet every variety would, is time were sarily of greater geographical interest than the rest. given, and the land remained unchanged in level relatively to the sea, The whole of the land which directs drainage towards ane river is Adjust
ultimately approach to the type. Movements of the land known as its basin, catchment area or drainage area sometimes,
either of subsidence or elevation, changes in the land by by an incorrect expression, as its valley or even its watershed. mentol
the action of erosion in cutting back an escarpment or The boundary line between one drainage area and others is rightly rivers to laad.
cutting through a col, changes in climate by affecting the termed the watershed, but on account of the ambiguity which has rainfall and the volume of water, all tend to throw the been tolerated it is better to call it water-parting or, as in America,
river valley out of harmony with the actual condition of divide. The only other important term which requires to be noted its stream. There is nothing more striking in geography than the here is tolweg, a word introduced from the Gerinan into French perfection of the adjustment of a great river system to its valleys and English, and meaning the decpese line along the valley, which when the land has remained stable for a very lengthened period. is necessarily occupied by a stream unless the valley is dry. Before full adjustment has been attained the river bed may be The functions of land forms extend beyond the control of the broken in places by waterfalls or interrupted by lakes; after adjust-circulation of the atmosphere, the hydrosphere and the water which ment the bed assumes a permanent outline, the slope diminishing is continually being interchanged between them; they are exercised more and more gradually, without a break in its symmetrical descent. with increased cffect in the higher departments of biogeography and Excellent examples of the indecisive drainage of a new land surface, anthropogeography. on which the river system has not had time to impress itself, are to be The sum of the organic lise on the globe is termed by some geoseen in northern Canada and in Finland, where rivers are separated graphers, the biosphere, and it has been estimated that the whole by scarcely perceptible divides, and the numerous lakes frequently mass of living substance in existence at one time would belong to more than one river system.
cover the surlace of the carth to a depth of one-fifth of
Blogeoe The action of rivers on the land is so important that it has been an inch.' The distribution of living organisms is a
graphy made the basis of a system of physical geography by Professor complex problem, a function of many factors, several of which
W. M. Davis, who classifics land surfaces in terms of are yet but little known. They include the biological nature of The geo
the three factors-structure, process and time of the organism and its physical environment, the latter involving graphical
these time, during which the process is acting on the conditions in which geographical elements, direct or indirect, precycle
structure, is the most important. A land may thus be ponderate. The direct geographical elements are the arrangement characterized by its position in the geographical cycle," or cycle
of land and sca (continents and islands standing in sharp contrast) of erosion, as young. mature or old, ihe last term being reached and the vertical relief of the globe, which interposes barriers of a when the base-level of crosion is attained, and the land, however less absolute kind between portions of the same land area or oceanic varied its relief may have been in youth or maturity, is reduced to depression. The indirect geographical elements, which, as a rule, a nearly uniform surface or peneplain. By a re-elevation of a act with and intensify the direct, are mainly climatic; the prepeneplain the rivers of an old land surface may be restored to vailing winds, rainfall, mcan and extreme temperatures of every youthful activity, and resume their shaping action, deepening the locality depending on the arrangement of land and sea and of land old valleys and initiating new ones, starting arresh the whole course forms. Climate thus guided affects the weathering of rocks, and of the geographical cycle. It is, however, not the action of the
so determines the kind and arrangement of soil. Different species running water on the land, but the function exercised by the land of organisms come to perfection in different climates; and it may on the running water, that is considered here to be the special be stated as a general rule that a species, whether of plant or animal, province of gcography. At every stage of the geographical cycle once established at one point, would spread over the whole zone the land forms, as they exist at that stage, are concerned in guiding of the climate congenial to it unless some barrier were interposed the condensation and flow of water in certain dehnite ways. Thus,
to its progress. In the case of land and fresh-water organisms for example, in a mountain range at right angles to a prevailing he sea is the chie! barrier; in the case of marine organisms, the sea-wind, it is the land forms which determine ihat one side of the land. Differences in land forms do not exert great influence on the range shall be richly watered and deeply dissected by a complete distribution of living creatures directly, but indirectly such land system of valleys, while the other side is dry, indefinite in its valley forms as mountain ranges and internal drainage basíns are very systems, and sends none of its scanty drainage to the sca. The potent through their action on soil and climate. A snow-capped action of rain, ice and rivers conspires with the movement of land
mountain ridge or an arid desert forms a barrier between different waste to strip the layer of soil from steep slopes as rapidly as it forms of life which is often more effective than an cqual breadth of forms, and to cause it to accumulate on the flat valley bottoms, on
In this way the surface of the land is divided into numerous the graceful Hattened cones of alluvial fans at the outlet of the gorges natural regions, the flora and fauna of each of which include some of tributaries, or in the smoothly.spread surlace of alluvial plains.
distinctive species not shared by the others. The distribution of The whole question of the régime of rivers and lakes is sometimes life is discussed in the various articles in this Encyclopaedia dealing treated under the name hydrography, a name used by some writers
with biological, botanical and zoological subjects. in the sense of marine surveying, and by others as synonymous with oceanography. For the study of rivers alone the name potamology:
SF. A. Forel, Handbuch der Seenkunde; allgemeine Limnoloşie has been suggested by Penck, and the subject
hcing of much
. “La Limnologie, branche de la géoimportance has received a good deal of attention.
graphic," Repori VI. Int. Geog. Congress (London, 1895), p. 593: The study of lakes has also been specialized under the name of
also Le Léman (2 vols., Lausanne, 1892, 1894); H. Lullies. "Studien
über Scen," Jubilaumsschrift der Albertus- Universitat (Königsberg, ..See, for a summary of river-action, A. Phillipson, Studien über 1894); and G. R. Credner. "Die Reliktenseen," Pelermanns MitteWasserscheiden (Leipzig, 1886); also I.C. Russell, River Devclopment lungen, Ergänzungshelte 86 and 89 (Gotha. 1887, 1888). (London, 1898) (published as The Rivers of North America, New York, J. Murray," Drainage Areas of the Continents," Scol. Geog. Mag. 1898).
ii. (1886) p. 548. W. M. Davis, “The Geographical Cycle," Geog. Journ. xiv. ? Wagner, Lehrbuch der Geographic (1900), i. 586. (1899) p. 484.
. For details, see A. R. Wallace, Geographical Distribution of * X. Penck. Pota mology as a Branch of Physical Geography," Animals and Island Life; A. Heilprin. Geographical and Geological Geog: Journ. x: (1897) p. 619;
Distribution of Animals (1887); 0. Drude, Handbuch der Pflanzen. • See, for instance, E. Wisotzki, Hauptfluss und Nebenfluss geographie; Á. Engler, Entwickelungsgeschichte der Pflonzenwelt; (Stettin, 1889). For practical studies sec official reports on the also Beddard, Zoogeography (Cambridge, 1895); and Sclater, The Mississippi, Rhine, Seine, Elbe and other great rivers.
Geography of Mammals (London, 1899).
The classification of the land surface into areas inhabited by approximately the general features of land and sea in long-past distinctive groups of plants has been attempted by many phyto: geological periods, and so to enable the history of crustal relief to be Floral
traced. geographers, but without resulting in any scheme of general acceptance. The simplest classification is perhaps While the tendency is for the living forms to come into harmony
that of Drude according to climatic zoncs, subdivided with their cnvironment and to approach the state of equilibrium according to continents. This takes account of-(!) the Arctico by successive adjustments if the environment should Alpine zone, including all the vegetation of the region bordering happen to change, it is to be observed that the action Reaction of on perpetual snow: (2) the Boreal zone, including the temperate of organisms themselves often tends to change their organisms. lands of North America, Europe and Asia, all of which are sub- environment. Corals and other quick-growing caloocaviros. stantially alike in botanical character; (3) the Tropical zone, divided carcous marine organisms are the most powerful in this col. sharply into (c) the tropical zone of the New World; and (b) the respect by creating new land in the occan. Vegetation of all sorts tropical zone of the Old World, the forms of which differ in a sig; acts in a similar way, either in forming soil and assisting in breaknificant degree; (4) the Austral zone, comprising all continental ing up, rocks, in filling up shallow lakes, and even, like the manland south of the equator, and sharply divided into three regions grove, in reclaiming wide stretches of land from the sca. Plant lise, the floras of which are strikingly distinct-(a) South American, utilizing solar light to combine the inorganic elements of water, (6) South African and (c) Australian; (5) the Oceanic, comprising soil and air into living substance, is the basis of all animal life. all oceanic islands, the flora of which consists exclusively of forms This is not by the supply of food alone, but also by the withdrawal whose seeds could be dristed undestroyed by ocean currents or of carbonic acid from the atmosphere, by which vegetation maintains carried by birds. To these might be added the antarctic, which is the composition of the air in a state fit for the support of animal still very imperfectly known. Many subdivisions and transitional lifc. Man in the primitive stages of culture is scarcely to be dis
From the point of view of the economy of the globe this classi- ment, but in the higher grades of culture the conditions of control fication by species is perhaps less important than that by mode and rcaction become much more complicated, and the department Vegetation
of life and physiological character in accordance with of anthropogeography is devoted to their consideration, environment. The following are the chief arcas of The first requisites of all human beings are food and protection,
vegetational activity usually recognized: (1) The ice in their search for which men are brought into intimate relations deserts of the arctic and antarctic and the highest mountain regions, with the forms and productions of the earth's surface. where there is no vegetation except the lowest forms, like that The degree of dependence of any people upon environ- Anthropo. which causes “ red snow (2) The tundra or region of intensely ment varies inversely as the degree of culture
or civiliza. seography. cold winters, forbidding free-growth, where mosses and lichens tion, which for this purpose may perhaps be defined as the power cover most of the ground when unírozen, and shrubs occur or of an individual to exercise control over the individual and over species which in other conditions are trecs, here sunted to the the environment for the benefit of the community. The developheight of a few inches. A similar zone surrounds the permanent ment of culture is to a certain extent a question of race, and although snow on lofty mountains in all latitudes. The tundra passes by forming one species, the varieties of mandiffer in almost imperceptible imperceptible gradations into the moor, bog and heath of warmer gradations with a complexity defying classification (sce ANTHROclimates. (3) The temperate forests of evergreen or deciduous trees, POLOGY). Professor Kcane groups man round four leading types, according to circumstances, which occupy those parts of both which may be named the black, yellow, red and white, or the Ethiopic, temperate zones where rainfall and sunlight are both abundant, Mongolic, American and Caucasic. Each may be subdivided, (4). The grassy steppes or prairies where the rainfall is diminished though not with great exactness, into smaller groups, either according and temperatures are extreme, and grass is the prevailing form of to physical characteristics, of which the form of the head is -most vegctation. These pass imperceptibly into-(5) the arid desert, important, or according to language. where rainfall is at a minimum, and the only plants are those modified The black type is found only in tropical or sub-tropical countries, to subsist with the smallest supply of water.' (0) The tropical forest, and is usually in a primitive condition of culture, unless educated which represents the maximum of plant luxuriance, stimulated by by contact with people of the white type. They follow the heaviest rainlall. greatest heat and strongest light. These the most primitive forms of religion (mainly fetishism),
Types of divisions merge one into the other, and admit of almost indefinite live on products of the woods or of the chase, with the subdivision, while they are subject to great modifications by human minimum of work, and have only a loose political organization. interference in clearing and cultivating. Plants exhibit the control- The red type is peculiar to America, inhabiting, every, climate from ling power of environment to a high degree, and thus vegetation is polar to equatorial, and containing representatives of many stages usually in close adjustment to the bolder gcographical features of of culture which had apparently developed without the aid or a region.
interference of people of any other race until the close of the 19th The divisions of the earth into faunal regions by Dr P. L. Sclater century. The yellow type is capable of a higher culture, cherishes have been found to hold good for a large number of groups of animals higher religious beliefs, and inhabits as a rulc the temperate zone,
as different in their mode of life as birds and mammals, although extending to the tropics on one side and to the arctic Paunal
and they may thus be accepted as based on nature. regions on the other. The white type, originating in the north realms.
They are six in number: 1). Poloearctic, including temperate zone, has spread over the whole world. They have Europe, Asia north of the Himalaya, and Africa north of the Sahara; attained the highest culture, prosess the purest forms of mono(2) Ethiopian, consisting of Alrica south of the Atlas range, and theistic religion, and have brought all the people of the black type Madagascar; (3) Oriental, including India, Indo-China and the and many of those of the yellow under their domination. Malay Archipelago north of Wallace's ling, which runs between The contrast between the yellow and white types has been softened Bali ang Lombok; (4) Australian, including Australia, New Zealand, by the remarkable development of the Japanese following the New Guinca and Polynesia: (5) Nearclic or North America, north assimilation of western methods. of Mexico; and (6) Neolropical or South America. Each of these The actual number of human inhabitants in the world has becn divisions is the home of a special sauna, many species of which calculated as follows: are confined to it alone; in the Australian region, indeed, practically the whole fauna is peculiar and distinctive, suggesting a prolonged
'By Race. period of complete biological isolation. In some cases, such as the
875,000,000 White (Caucasic) 770,000,000 Ethiopian and Neotropical and the Palacarctic and Ncarctic regions, Europe
Yellow (Mong) 540,000,000 the launas, although distinct, are related, several forms on opposite Africa
170,000,000 Black (Ethiopic). 175,000,000 sides of the Atlantic being analogous, e.g. the lion and puma, ostrich America
143,000,000 Red (American). 22,000,000 and rhea. Where two of the launal realms meet there is usually, Australia and
Polynesia though not always, a mixing of faunas. These facts have led some
Total . 1.507,000,000
7,000,000 naturalists to include the Palacarctic and Nearctic regions in one, termed Holarctic, and to suggest transitional regions, such as the
Total 1,587,000,000 Sonoran, between North and South America, and the Mediterranean,
In round numbers the population of the world is about between Europe and Africa, or to create sub-regions, such as Mada
1,600,000,000, and, according to an estimate by Ravenstein,' the gascar and New Zealand. Occanic islands have, as a rule, distinctive maximum population which it will be possible for the earth to launas and floras which resemble, but are not identical with, those of maintain is 6000 millions, a number which, if the average rate of other islands in similar positions.
increase in 1891 continued. would be reached within 200 years. The study of the evolution of faunas and the comparison of the While highly civilized communities are able to evade many of
launas of distant regions have furnished a trustworthy the restrictions of environment, to overcome the barriers to inter. Biological instrument of pre-historic geographical research, which communication interposed by land or sea, to counteract the adverse
enables earlier geographical relations of land and sea to tion as
be traced out, and inc approximate period, or at least the See particularly A. de Lapparent, Traité de géologie (4th ed.,
chronological order of the larger changes, to be estimated. Paris, 1900). of geographical
In this way, for example, it has been suggested that a • Estimate for 1900. H. Wagner, Lehrbuch der Geographie, i. research.
land, "Lemuria," once connected Madagascar with the
Malay Archipelago, and that a northern extension of • Estimate for year not stated. A. H. Keane in Inlernational the antarctic land once united the three southern continents. Geography, p. 108.
The distribution of fossils frequently makes it possible to map out lo Proc. R.G.S. xiii. (1891) p. 27.
oleoviron. ment og
589) 568 558 4954 436
influence of climate, and by the development of trade even to cation between communities and the interchange of their proinhabit countries which cannot yield a food-supply, the mass of ducts. Trade makes it possible to work mineral resources mankind is still completely under the control of those conditions in localities where food can only be grown with great
Density of which in the past determined the distribution and the mode of life diffculty and expense, or which are even totally barren
populatioa, of the whole human race.
and waterless, entirely dependent on supplies from discant sources. In tropical forests primitive tribes depend on the collection of The population which can be permanently supported by a given wild fruits, and in a minor degree on the chase of wild animals, lor area of land differs greatly according to the nature of the resources
their food. Clothing is unnecessary; hence there is and the requirements of the people. Pastoral communities are Influence little occasion for excrcising the mental faculties beyond always scattered very thinly over large areas; agricultural popular
the sense of perception to avoid enemies, or the in- tions may be almost equally sparse where advanced methods of ventive arts beyond what is required for the simplest agriculture and labour-saving machinery are employed; but where
weapons and the most primitive fortifications. When a frugal people are situated on a fertile and inexhaustible soil, such the pursuit of game becomes the chief occupation of a people there as the deitas and river plains of Egypt, India and China, an enormous is of necessity a higher development of courage, skill, powers of population may be supported on a small arca. In most cases, observation and invention; and these qualities are still further however, a very dense population can only be maintained in regions enhanced in predatory tribes who take by force the food, clothing where mineral resources have fixed the site of great manufacturing and other property prepared or collected by a secbler people. The industries. The maxiinum density of population which a given fruit-eating savage cannot stray beyond his woods which bound region can support is very difficult to determine; it depends partly his life as the water bounds that of a fish; the huntcr is free to on the race and standard of culture of the people, partly on the live on the margin of forests or in open country, while the robber nature and origin of the resources on which they depend, partly or warrior from some natural stronghold of the mountains sweeps on the artificial burdens imposed and very largely on the climate. over the adjacent plains and carries his raids into distant lands. Density of population is measured by the average number of people Wide grassy steppes lead to the organization of the people as nomads residing on a unit of arca; but in order to compare one part of the whose wealth consists in flocks and herds, and their dwellings world with another the average should, strictly speaking, be taken The nomad not only domesticates and turns to his
for regions of equal size or of equal population; and the portions own use the gentler and more powerful animals, such as shecp, of the country which are permanently uninhabitable ought to be cattle, horses, camels, but cven turns some predatory creatures, cxcluded from the calculation. Considering the average density like the dog, into a means of defending their natural prey. They of population within the political limits of countries, the following hunt thc bcasts of prey destructive to their flocks, and form armed list is of some value; the figures for a few smaller divisions of
for protection against marauders or for purposes of aggression large countries are added (in brackets) for comparison: on weaker sedentary neighbours. On the fertile low grounds along the margins of rivers or in clearings of forests, agricultural com munities naturally take their rise, dwelling in villages and cultivating
Average Population on i sq. m. (For 1900 or 1901.) the wild grains, which by careful nurture and selection have been
Density turned into rich cereals. The agriculturist as a rule is rooted to
Density the soil. The land he tills he holds, and acquires a closer connexion with a particular patch of ground than cither the hunter or the herds (Saxony).
Ceylon man. In the temperate zone, where the seasons are sharply con- Belgium
97 trasted, but follow each other with regularity, foresight and self-denial Java
European Turkey were lostered, because if men did not exercise these qualities seed-time (England and Wales)
Spain : or harvest might pass into lost opportunities and the tribes would (Bengal)
European Russia : suffer. The more extreme climates of arid regions on the margins of Holland
Sweden the tropics, by the unpredictable succession of droughts and Hoods, United Kingdom
25 confound the prevision of uninstructed people, and make prudence
Mexico and industry qualities too uncertain in their results to be worth Italy
18 cultivating. Thus the civilization of agricultural peoples of the
Persia temperate zone grew rapidly, yet in each community a special type German Empire
7 arose adapted to the soil, the crop and the climate. On the sea. Austria
5 shore fishing naturally, became a means of livelihood, and dwellers Switzerland
4.5 by the sca, in virtue of the dangers to which they are exposed from France
Eastern States of storm and unscaworthy crast, are stimulated to a higher degree of Indian Empire
167 foresight, quicker obscrvation, prompter decision and more energetic Denmark
Dominion of Canada
1.5 action in emergencies than those who live inland. The building Hungary
Siberia and handling of vessels also, and the utilization of such uncon- Portugal
West Australia trollable powers of nature as wind and tide, helped forward mechanical invention. To every type of coast there may be related a special type of occupation and cven of character;. the deep and gloomy The movement of people from one place to another without the fjord, backed by almost impassable mountains, bred bold mariners immediate intention of returning is known as migration, and accordthe viks created the vikings. On the gently sloping margin of the from a particular area) and centripetal (directed towards Migratios. estuary of a great river a view of tranquil inland life was equally a particular arca). Centrifugal migration is usually a matter of presented to ihe shore-dweller, and the ocean did not present the compulsion; it may be necessitated by natural causes, such as a only prospect of a career. Finally the mountain valley, with its change of climate leading to the withering of pastures or destruction patches of cultivable soil on the alluvial fans of tributary torrents, of agricultural land, to inundation, carthquake, pestilence or to an its narrow pastures on the uplands only left clear of snow in summer, excess of population over means of support; or to artificial causes, its intensificd extremes of climates and its isolation, almost equal to such as the wholesale deportation of a conquered people; or to that of an island, has in all countries produced a special type of political or religious persecution. In any case the people are driven brave and hardy people, whose utmost effort may bring them com- out by some adverse change; and when the urgency is great they fort, but not wealth, by honest toil, who know little of the outer may require to drive out in turn weaker people who occupy a desirable world, and to whom the natural outlet for ambition is marauding territory, thus propagating the wave of migration, the direction of on the fertile plains. The highlander and viking, products of the which is guided by the forms of the land into inevitable channels, valleys raised high amid the mountains or half-drowned in the sea, Many of the great historic movements of peoples were doubtless due are everywhere of kindred spirit.
to the gradual change of geographical or climatic conditions; and the It is in some such manner as these that the natural conditions slow desiccation of Central Asia has been plausibly suggested as the of regions, which must be conformed to by prudence and utilized real cause of the peopling of modern Europe and of the medieval by labour to yic!d shelter and food, have led to the growth of peoples wars of the Old World, the theatres of which were critical points on differing in their ways of life, thought and specch. The initial the great natural lines of communication between east and west. differences so produced are confirmed and perpetuated by the In the case of centripetal migrations people flock to some particular same barriers which divide the faunal or floral regions, the scan place where exceptionally lavourable conditions have been found to mountains, deserts and the like, and much of the course of past exist. The rushes to gold-fields and diamond-fields are typical inhistory and present politics becomes clear when the combined stances; the growth of towns on coal-fields and near other sources results of diffcring race and differing environment are taken into of power, and the rapid settlement of such rich agricultural districts account.
as the wheat-lands of the American prairies and great plains are The specialization which accompanies the division of labour has other examples. important geographical consequences, for it necessitates communi. There is, however, a tendency for people to remain rooted to the
! On the influence of land on people see Shaler, Nature and ?. Sce maps of density of population in Bartholomew's great large Man in America (New York and London, 1892); and Ellen C. scale atlases. Atlas of Scotland and Atlas of England, Semple's American History and ils Geographic Conditions (Boston, • Almost exclusively industrial. 1903).
• Almost exclusively agricultural,
270 226 207
Lines of commual cation,
land of their birth, when not compelled or induced by powerful or federated of distinct self-governing units liko Germany (where external causes to seek a new home.
the units include kingdoms, at least three minor types of monarchies, Thus arises the spirit of patriotism, a product of purely geo- municipalities and a crown land under a nominated governor), or the graphical conditions, thereby differing from the sentiment of loyalty, United States, where the units are democratic republics. The ulti
which is of racial origin. Where race and soil conspire to mate cause of the predominant form of federal government may be
evoke both loyalty and patriotism in a pcople, the moral the geographical diversity of the country, as in the cantons occupying geography,
qualitics of a great and permanent nation are secured. the once isolated mountain valleys of Switzerland, the racial diversity It is noticeable that the patriotic spirit is strongest in those places of the people, as in Austria-Hungary, or merely political expediency. where people are brought most intimately into relation with the land; as in republics of the American type. dwellers in the mountain or by the sea, and, above all, the people of The minor subdivisions into provinces, counties and parishes, or rugged coasts and mountainous archipelagoes, have always been analogous areas, may also be related in many cases to natural renowned for love of country, while the inhabitants of fertile plains features or racial differences perpetuated by historical causes. The and trading communities are frequently less strongly attached to territorial divisions and subdivisions often survive the conditions their own land.
which led to their origin; hence the study of political geography is Amongst nomads the tribe is the unit of government, the political allied to history as closely as the study of physical geography is allied bond is personal, and there is no definite territorial association to gcology, and for the same reason. of the people, who may be loyal but cannot be patriotic. The idca The aggregation of population in towns was at one time mainly of a country arises only when a nation, cither homogencous or brought about by the necessity for defence, a fact indicated by the composed of several races, establishes itself in a region the boundaries defensive sites of many old towns. In later times, of which may be defined and defended against aggression from towns have been more often founded in proximity to without. Political geography takes account of the partition of the valuable mineral resources, and at critical points or nodes on lines carth amongst organized communitics, dealing with the relation of of communication. These are places where the mode of travelling races to regions, and of nations to countries, and considering the or of transport is changed, such as seaports, river ports and railway conditions of territorial equilibrium and instability,
termini, or natural resting places, such as a ford, the foot of a The definition of boundaries and their delimitation is one of the steep ascent on a road, the entrance of a valley leading up from a most important parts of political geography. Natural boundaries plain into the mountains, or a crossing place of roads or railways.? Bowod
are always the most definite and the strongest, lending The existence of a good natural harbour is often sufficient to themselves most readily to defence against aggression. give origin to a town and to fix one end of a line of land com
The sea is the most effective of all, and an island state is munication. recognized as the most stable. Next in importance comes a moun. In countries of uniform surface or saint reliel, roads and railways tain range, but here there is often difficulty as to the definition of may be constructed in any direction without regard to the con. the actual crest-line, and mountain ranges being broad regions, it figuration. In places where the low ground is marshy, may happen that a small independent state, like Switzerland or roads and railways often follow the ridge-lines of hills, Andorra, occupies the mountain valleys between two or more great or, as in Finland, the old glacial eskers, which run parallel countries. Rivers do not form effective international boundaries, to the shore. Wherever the relief of the land is proalthough between dependent sell-governing communities they are nounced, roads and railways are obliged to occupy the lowest ground convenient lines of demarcation. A desert, or a belt of country winding along the valleys of rivers and through passes in the moun. Jeft purposely without inhabitants, like the mark, marches or tains. In exceptional cases obstructions which it would be impossible debatable lands of the middle ages, was once a common means or too costly to turn are overcome by a bridge or tunnel, the magni. of separating nations which nourished hereditary grievances. The tude of such works increasing with the growth of engineering skill * buffer-state" of modern diplomacy is of the same ineffectual and financial enterprise. Similarly the obstructions offered to týpe. A less definite though very practical boundary is that formed water communication by interruption through land or shallows are by the meeting-line of two languages, or the districts inhabited overcomc by cutting canals or dredging out channels. The economy by two races. The line of fortresses protecting Austria from Italy and success of most lines of communication depend on following lies in some places weil back from the political boundary, but as far as possible existing natural lines and ulilizing existing natural just inside the linguistic frontier, so as to separate the German sources of power." and Italian races occupying Austrian territory. Arbitrary lines, Commercial geography, may be defined as the description of the either traced (rom point to point and marked by posts on the ground, carth's surface with special recrence to the discovery, production, or defined as portions of neridians and parallels, are now the most transport and exchange of commodities.
The transport common type of boundaries hxed by treaty.. In Europe and Asia concerns land routes and sea routes, the latter being frontiers are usually strongly fortified and strictly watched in times the more important. While steam has been said to of peace as well as during war. In South America strictly defined make a ship independent of wind and tide, it is still graphy. boundaries are still the exception, and the claims of neighbouring true that a long voyage even by steam must be planned so as to nations have very frequently given rise to war, though now more encounter the least resistance possible from prevailing winds and commonly to arbitration.'
permanent currents, and this involves the application of occanoThe modes of government amongst civilized peoples have little graphical and meteorological knowledge. The older navigation by influence on political geography: some republics are as arbitrary utilizing the power of the wind demands a very intimate knowledge
and exacting in their fronticr regulations as some absolute of these conditions, and it is probable that a revival of sailing govern
monarchies are confined to the cast of Europe and to the study of maritime meteorology.
Asia, Japan being the only established constitutional The discovery and production of commoditics require a know. monarchy east of the Carpathians. Limited monarchics are (with ledge of the distribution of geological formations for mineral prog the exception of Japan) peculiar to Europe, and in these the degree ducts, of the natural distribution, life-conditions and cultivation of democratic control may be said to diminish as one passes east. or breeding of plants and animals and of the labour market. Atten. wards from the United Kingdom. Republics, although represented tion must also be paid to the artificial restrictions of political geoin Europe are the peculiar form of government of America and graphy, to the legislative restrictions bearing on labour and trade are unknown in Asia.
as imposed in different countries, and, above all, to the incessant The forms of government of colonies present a series of transi- Nuctuations of the economic conditions of supply and demand and tional types from the autocratic administration of a governor the combinations of capitalists or workers which affect the market. appointed by the home government to complete democratic sell. The term “applied geography has been cmployed to designate government. The latter occurs only in the temperate possessions commercial geography, the lact being that every aspect of scientific of the British empire, in which there is no great preponderance gcography may be applied to practical purposes, including, the of a coloured native population. New colonial forms have been purposes of trade. But apart from the applied science, there is an developed during the partition of Africa amongst European powers. aspect of pure geography which concerns the theory of the relation the sphere of influence being especially worthy of notice. This of economics to the surface of the earth. is a vaguer form of control than a protectorate, and frequently It will be scen that as each successive aspect of geographical amounts merely to an agreement amongst civilized powers to respect science is considered in its natural sequence the conditions become the right of one of their number to exercise government within a certain area, il it should decide to do so at any future time.
? For numerous special instances of the determining causes of The central governments of all civilized countries concerned with town sites, see G. G. Chisholm, On the Distribution of Towns external relations are closely similar in their modes of action, but and Villages in England," Geographical Journal (1897), ix. 76, the internal administration may be very varied. In this respect a country is cither centralized, like the United Kingdom or France,
• The whole subject of anthropogeography is treated in a masterly
way by F. Ratzel in his Anthropogeographie (Stuttgart, vol. i. and "For the history of territorial changes in Europe, see Freeman. ed., 1899. vol. ii. 1891), and in his Politische Geographie (Leipzig. Historical Geograpky of Europe. edited by Bury. (Oxford). 1903: 1897).. The special question of the reaction of man on his environ, and for the official definition of existing boundaries, see Hertslctment is handled by G. P. Marsh in Man and Nature, or Physical The Map of Europe by Trealy (4 vols.. London, 1875. 1891); The Geography as modified by Human Action (London, 1864). Map of Africa by Treaty (3 vols., London, 1896). Also Lord Curzon's • For commercial geography see G. G. Chisholm, Manual of Cons. Oxford address on Frontiers (1907).
mercial Geography (1890).
Commer cial geo"