The Encyclopedia Americana, Volume 7Grolier, 1989 - Encyclopedias and dictionaries |
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Page 3
... tion , writing began , metallurgy developed , irriga- tion spread , and sailing vessels , wheeled vehicles , stone sculpture , accurate measurement of time and space , and many other new technologies ap- peared among the Sumerians ...
... tion , writing began , metallurgy developed , irriga- tion spread , and sailing vessels , wheeled vehicles , stone sculpture , accurate measurement of time and space , and many other new technologies ap- peared among the Sumerians ...
Page 235
... tion the trade union movement in the United States has sought recognition from employers so that unions might enjoy the right of representa- tion and might negotiate an enforceable contract , the culminating point in collective ...
... tion the trade union movement in the United States has sought recognition from employers so that unions might enjoy the right of representa- tion and might negotiate an enforceable contract , the culminating point in collective ...
Page 312
... tion in other parts of the spectrum . Any full explanation of how color is pro- duced by the use of colorants is quite compli- cated , but in general it relates to the absorp- tion and scattering of light in colorant layers by pigments ...
... tion in other parts of the spectrum . Any full explanation of how color is pro- duced by the use of colorants is quite compli- cated , but in general it relates to the absorp- tion and scattering of light in colorant layers by pigments ...
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19th century Africa American Atlantic cod became Bogotá born Britain British church civil Clark Clay Cleisthenes Cleveland climate clocks cloture cloud clubs coal coal tar Coast Guard coeducation coelacanth coffee coinage coins coke College Colombia colonies color Colorado Columbia Columbus comets comic commercial common cold common law Commonwealth COMMONWEALTH OF NATIONS Communist countries courts developed died early East economic elected Empire England English established European example federal France French higher education important India Indian industry institutions Island known land later latitudes major ment meters miles montmorillonite mountain Museum National North Ocean organization party period plants political Population president production programs region River Roman served social South southern Soviet Soviet Union species temperature tion trade treaties Union United University usually West western World World War II York