Proceedings of the American Association for the Advancement of Science, Volume 29 |
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Results 1-5 of 75
Page iv
... Experiments on the Strength of Yellow Pine . Abstract . By R. H. THURSTON The Velocity of Shot . By ALFRED M. MAYER ... experiment on the Interference of Light . Abstract . By ALFRED M. MAYER • New Planetary Nebulæ . Abstract . By EDWARD ...
... Experiments on the Strength of Yellow Pine . Abstract . By R. H. THURSTON The Velocity of Shot . By ALFRED M. MAYER ... experiment on the Interference of Light . Abstract . By ALFRED M. MAYER • New Planetary Nebulæ . Abstract . By EDWARD ...
Page 5
... experiments of Thomson have vindicated Volta and established the contact theory as a vera causa . And more cu- riously still , it now appears to be proved that both contact and chemical action underlie the production of that very animal ...
... experiments of Thomson have vindicated Volta and established the contact theory as a vera causa . And more cu- riously still , it now appears to be proved that both contact and chemical action underlie the production of that very animal ...
Page 6
... experiments , that a difference of electrical potential is always developed at the surfaces of contact of heterogeneous media . Not only is this true of solids in contact with solids , but also of solids in contact with liquids , and of ...
... experiments , that a difference of electrical potential is always developed at the surfaces of contact of heterogeneous media . Not only is this true of solids in contact with solids , but also of solids in contact with liquids , and of ...
Page 9
... experiment , he found that electricity required rather more than one - millionth of a second to pass through one - quarter ... experiments made to determine the velocity of electricity on long wires are explained.51 In the nerve itself ...
... experiment , he found that electricity required rather more than one - millionth of a second to pass through one - quarter ... experiments made to determine the velocity of electricity on long wires are explained.51 In the nerve itself ...
Page 11
... experiment is repeated but with this difference , that the particular sound to be used is unknown to the ... experiments , Donders found that the value b - a in the case of a simple di- lemma was seventy - five thousandths of ...
... experiment is repeated but with this difference , that the particular sound to be used is unknown to the ... experiments , Donders found that the value b - a in the case of a simple di- lemma was seventy - five thousandths of ...
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acid action Albany Alexis Caswell apparatus Association astronomers ATURE B. A. Gould battery beam binary stars Born Boston Cambridge cell Charles Chem chemical Cincinnati COEFF College color comet Conn determination Died discovery disk distance effect electric empty pipette energy ether experiments F. W. Putnam forest FRIC friction George Haven heat Henry Henry's inch instrument Iowa James John light liquid Louis magnet Mass measures mechanical metal method molecular molecules motion muscle Nashville O. C. Marsh observations Observatory Ohio P. O. Box Permanent Secretary PERMANENT SUBSECTION phenomena Philadelphia plant plate President produced Prof protoplasm required to empty researches Saratoga Springs schools scientific Seconds required sections selenium Spindle Standing Committee stars substance surface tellurium TEMPER temperature Tenn theory tion Univ Washington William wire Yale College York
Popular passages
Page 92 - Concerning each of which, many seem to have fallen into very great errors ; for by invention, I believe, is generally understood a creative faculty, which would indeed prove most romance writers to have the highest pretensions to it ; whereas by invention is...
Page 80 - ... which certainly form a new era in the history of electricity and magnetism, should not have been more fully described before this time in some of the English publications; the only mention I have found of them is the following short account from the Annals of Philosophy for April, under the head of Proceedings of the Royal Institution :
Page 131 - A large number of trials of this apparatus have been made with the transmitting and receiving instruments so far apart that sounds could not be heard directly through the air. In illustration, I shall describe one of the most recent of these experiments. Mr. Tainter operated the transmitting instrument, which was placed on the top of the Franklin School House in Washington, DC, and the sensitive receiver was arranged in one of the Fio.
Page 73 - Around this horse-shoe 540 feet of copper bell-wire were wound in nine coils of 60 feet each ; these coils were not continued around the whole length of the bar, but each strand of wire (according to the principle before mentioned) occupied about two inches, and was coiled several times backward and forward over itself. The several ends of the wires...
Page 92 - By genius I would understand that power, or rather those powers of the mind, which are capable of penetrating into all things within our reach and knowledge, and of distinguishing their essential differences.
Page 131 - Mr. Bell, if you hear what I say, come to the window and wave your hat.
Page 93 - But facts were important to me, and saved me. I could trust a fact, and always cross-examined an assertion. So when I questioned Mrs. Marcet's book by such little experiments as I could find means to perform, and found it true to the facts as I could understand them, I felt that I had got hold of an anchor in chemical knowledge, and clung fast to it.
Page 122 - ... telephone from one place to another without the necessity of a conducting wire between the transmitter and receiver. It was evidently necessary, in order to reduce this idea to practice, to devise an apparatus to be operated by the voice of a speaker, by which variations could be produced in a parallel beam of light, corresponding to the variations in the air produced by the voice.
Page 78 - Kritik, Ohm's theory was named a web of naked fancies, which can never find the semblance of support from even the most superficial observation of facts ; ' he who looks on the world/ proceeds the writer, ' with the eye of reverence must turn aside from this book as the result of an incurable delusion, whose sole effort is to detract from the dignity of nature.
Page 118 - To ensure that temperature was in no way affecting the experiments, one of the bars was placed in a trough of water so that there was about an inch of water for the light to pass through, but the results were the same ; and when a strong light from the ignition of a narrow band of magnesium was held about nine inches above the water the resistance immediately fell more than two-thirds, returning to its normal condition immediately the light was extinguished.