The American Journal of Science, Volume 121J.D. & E.S. Dana, 1881 - Earth sciences |
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Common terms and phrases
absorption acid appears Archaeopteryx Atlantosaurus atoms beds birds boiling carbon Carboniferous cavities character chloride coast color column containing County Cretaceous crystals deposits described determined Devonian diameter Diff east effect elevation Eocene experiments fact feet figure Florida formation fossils Fuess galvanometer genus geological glass gneiss granite heat Hesperornis hornblende hydrochloric acid hydrogen Ichthyornis inches indicated Journal known lamp-black length light limestone lines liquid mass mercury miles mineral Miocene mountain nearly observations obtained occur Odontornithes paper photosphere plates portion precipitated present pressure probably produced Professor quartz refractive region Report represented River rocks schist SCI.-THIRD SERIES selenium shown shows side Silurian silver solar species specimens spectrum stations Stegosaurus storms structure substances sulphur surface temperature thermometer tion tourmaline tube vapor vertebræ vertical volume Yale College York Island
Popular passages
Page 108 - The formation of the surrounding country shows no high land or rocky hills, from which a glacier might have been derived and then covered with debris from their sides. The continuity of the mossy surface showed that the ice must be quite destitute of motion, and the circumstances appeared to point to
Page 238 - that if there was no dust there would be no fogs, no clouds, no mists, and probably no rain, and that the supersaturated air would convert every object on the surface of the earth into a condenser on which it would deposit;
Page 146 - the black flood of lava would stretch away into the high grounds. It was as if the great plain had been filled with molten rock which had kept its level and wound in and out along the bays and promontories of the
Page 380 - was a model of conscientious investigation and scientific accuracy. Professor Miller was subsequently a member of a new Royal Commission for "examining into and reporting on the state of the secondary standards, and for considering every question which could affect the primary, secondary and local standards"; and in 1870 he was appointed a member of the "Commission Internationale du
Page 403 - that they cannot be traced back to an origin almost in contact with the present surfaces of their planets, as was shown in previous papers to be probably the case with the moon and earth. The part played by tidal friction in the evolution of planetary masses is then discussed.
Page 146 - Riding hour after hour among these arid wastes, I became convinced that all volcanic phenomena are not to be explained by the ordinary conception of volcanoes, but that there is another and grander type of volcanic action, where, instead of issuing from separate vents
Page 145 - the great Snake River lava desert of Idaho. It was the last day of a journey of several hundred miles through the volcanic region of the Yellowstone and Madison. We had been riding for two days over fields of basalt, level as lake bottoms, among the
Page 464 - substance to be experimented with in a glass testtube, connect a rubber tube with the mouth of the test-tube, placing the other end of the pipe to the ear. Then focus the intermittent beam upon the substance in the tube. I have tried a large
Page 470 - Under these circumstances a pulse of air should be expelled, just as we would squeeze out water from a sponge. The loud sounds produced from such substances may perhaps be explained in the following manner: Let us consider, for example, the case of lamp-black—a substance which becomes heated by exposure to rays of all
Page 478 - is very great, especially when we consider the expense of such rare substances as selenium and tellurium. The form of lamp-black cell we have found most effective is shown in fig. 8. Silver is deposited upon a plate of glass, and a zigzag line is then scratched through the film, as shown.