Proceedings of the American Association for the Advancement of Science, Volume 42 |
Contents
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Common terms and phrases
acid Agric alternating current Appalachian Archean axis Born Boston Cambrian Cambridge carbonate of lime Carboniferous Cenozoic Charles Chem chemical Chicago Cincinnati Cleveland College Columbia Conn continent Cordilleran sea Cretaceous curves CuSO denudation deposition Dept determine Devonian Died April Died Dec Died Feb earth Edward electromotive force engineering Eocene erosion estimate evolution feet folding geologic geologist George Haven Henry heterodont Iowa Ithaca James John Joseph July Lake land area latitude limestones Louis Madison Marsupials Mass mechanical sediments Mesozoic method Miocene molars Monotremes mountain N. Y. ABSTRACT ocean Ohio Ohio 30 Oreodons oxide Paleozoic paper period Perissodactyls Ph.D phenomena Philadelphia present Prof Rochester rocks Secretary Section sediments Sept Smith solution square miles strata structure Survey teeth theory thickness Thomas tion triconodont tritubercular ungulate Univ Washington William York
Popular passages
Page xxx - The objects of the Association are, by periodical and migratory meetings, to promote intercourse between those who are cultivating science in different parts of America, to give a stronger and more general impnlse and more systematic direction to scientific research, and to procure for the labors of scientific men Increased facilities and a wider usefulness.
Page 146 - The total annual rainfall on the land of the globe, and the relation of rainfall to the...
Page 133 - Consequently, if the theory be true, it is indisputable that before the lowest Cambrian stratum was deposited long periods elapsed, as long as, or probably far longer than, the whole interval from the Cambrian age to the present day ; and that during these vast periods the world swarmed with living creatures.
Page 137 - ... the mathematical mill is an admirable piece of machinery, but that the value of what it yields depends upon the quality of what is put into it. That there must be some flaw in the physical argument I can, for my own part, hardly doubt, though I do not pretend to be able to say where it is to be found. Some assumption, it seems to me, has been made, or some consideration has been left out of sight, which will eventually be seen to vitiate the conclusions, and which when duly taken into account...
Page 154 - This does not impress me strongly; but from my experience among the Paleozoic rocks I agree with Sir A. Geikie, that "we can see no proof whatever, nor even any evidence which suggests, that on the whole the rate of waste and sedimentation was more rapid during Mesozoic and Paleozoic time than it is to-day.
Page xxxiii - Association, and arrange the programme for the first day of the sessions. The time and place of this first meeting shall be designated by the Permanent Secretary. Unless otherwise agreed upon, regular meetings of the...
Page 43 - It should first be said that in beginning these investigations I deliberately put aside all teachings of theory, because it seemed to me high time that the facts should be examined by a purely inductive process ; that the nugatory results of all attempts to detect the existence of the Eulerian period...
Page 161 - ... have been deposited in the Cordilleran sea. Such a result is manifestly a maximum, based on the consideration of one set of phenomena. In addition, however, to this supply of calcium, the geographic conditions appear to have been favorable to the free circulation of oceanic currents through the Cordilleran sea, and the temperature was favorable to extensive evaporation and to the development of organic life, as shown by the occurrence of corals in the middle and upper portions of the Paleozoic,...
Page 163 - It follows from this that if the salinity of the ocean has remained the same as at the present during the whole of this period, then it has taken 680,000 years for the deposits of the above thickness, or containing calcium in amount equal to that at present in solution in the ocean, to have accumulated on the floor of the...
Page 214 - Wahsatch and Bridger ; only a few flesh-eaters survived to the Miocene. It is most important to grasp clearly the idea of this functional radiation in all directions of this old Puerco fauna, resulting in forms like the modern insectivores, rodents...