The American Journal of ScienceJ.D. & E.S. Dana, 1919 |
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Common terms and phrases
åkermanite algæ algal appear asthenosphere Barrell basins beds bowlders brachiopods CaO MgO SiO Carlim cent composition CaO Composition wt compound coral cristobalite crust Cryptolithus crystals deflections density deposits diopside earth elevation erosion evidence fauna feet field formation fossils geodetic Geol geological geologists Glacial Glass Glass+crystals Glasstrace gravity Hackberry Hayford hypothesis igneous indicated inversion islands isostasy isostatic compensation Joseph Barrell JOUR Journal laccoliths lagoon limestone mass melting miles mineral monticellite mountain Naticopsis nature observed ocean Ordovician origin orthogenesis oxide paleontology paper Paris pebbles Pleistocene probably Professor pseudowollastonite published quartz reefs region relations residuals rocks Salona sand SCI.-FOURTH SERIES Science scientific sea-level sediments septa shale shown silica SiO2 solid solutions species specimens Spirifer Stones River structure surface Survey temperature tephroite ternary system Tertiary theory thickness tion torbernite Trenton tridymite upper vertical Webster wollastonite writer zone
Popular passages
Page 163 - Washington, DC The Institute for Government Research is an association of citizens for cooperating with public officials in the scientific study of government with a view to promoting efficiency and economy in its operations and advancing the science of administration.
Page 306 - It Is believed that the following theorem or working hypothesis Is worthy of consideration and of comparison with additional facts : Mountains, mountain ranges, and valleys of magnitude equivalent to mountains, exist generally In virtue of the rigidity of the earth's crust; continents, continental plateaus, and oceanic basins exist In virtue of Isostatic equilibrium In a crust heterogeneous as to density.
Page 338 - AMERICAN JOURNAL OF SCIENCE ESTABLISHED BY BENJAMIN SILLIMAN IN 1818. The Leading Scientific Journal in the United States Devoted to the Physical and Natural Sciences, with special reference to Physics and Chemistry on the one hand, and to Geology and Mineralogy on the other.
Page 427 - At some seasons they are about as regular and unceasing as the trade winds of the ocean. It will often blow a gale for days and even weeks together without slacking for a moment, except occasionally at night. It is for this reason, as well as on account of the rains, that percussion guns are preferable upon the prairies, particularly for those who understand their use. The winds are frequently so severe as to sweep away both sparks and priming from a flint lock, and thus render it wholly ineffective.
Page 164 - State names and boundaries, principal rivers, capitals and largest cities in the different states, are the only information otherwise embodied. The map is of special interest from the fact that it is based on the same system of projection as that which was employed by the armies of the allied forces in the military operations in France. To meet those requirements and at the request of the Army, special publications were prepared by the Coast and Geodetic Survey. Many methods of projection have been...
Page 312 - From the evidence it is safe to conclude that the isostatic compensation is so nearly complete on an average that the deflections of the vertical are thereby reduced to less than one-tenth of the mean values which they would have if no isostatic compensation existed.
Page 334 - It is seen that the residuals average several times as great in India as in the United States, which leads him to conclude that "Speaking generally it would appear that isostatic conditions are much more nearly realized in America than in India, ie, if we are to take the smallness of the residuals as an indication of the completeness of isostatic compensation."2 Colonel Burrard, utilizing the Hayfordian computations, points out the existence of zones 1 Professional Paper No.
Page 250 - JS DILLER, of Washington. Two volumes annually, in MONTHLY NUMBERS of about 80 pages each. This Journal ended its first series of 50 volumes as a quarterly in 1845 ; its second series of 50 volumes as a two-monthly in 1870; its third series as a monthly ended December, 1895. A FOURTH SERIES commenced in January, 1896.
Page 164 - Projection, seal; 1-5.000.000, dimensions, 25 x 39 inches, price, 25 cents. This map is intended merely as a base to which may be added any kind of special information desired. The shoreline is compiled from the most recent Coast and Geodetic Survey charts.
Page 282 - The geological history of the Archean Highlands of New Jersey, including their extension in New York and [southeast] Pennsylvania: Thesis, Yale Univ., 1896.