The American Journal of ScienceJ.D. & E.S. Dana, 1908 |
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
actinium actinolite activity American amount of radium appears beds bones carbonate carnotite cent Chem chemical chloride cm³ collected color containing crucible crystals cycad deposits described determined diameter diffusion diffusion chamber dilute elephants Eocene experiments fauna feet feldspar film filtered filtrate flask formation Fort Benton fossils Geol Geological gram heat hulsite hydrochloric acid inches ionium iron Journal lake later layers limestone lower magnesium magnetic magnetite mastodon material method miles mineral Museum observed obtained occur olivine original oxalates oxide plates polonium portion precipitated present proboscidians Professor radio-active radium emanation region residue rhizome rock sandstone SCI.-FOURTH SERIES separated shale shows Silurian skull sodium solar solar prominences solution species specimens Stegodon structure substance sulphate sulphuric acid surface Table temperature thick thin thorium tion Triceratops tube tusks upper uraninite uranium valley vapor volume weight zinc
Beliebte Passagen
Seite 460 - Memorials of Charles Darwin : a Collection of Manuscripts, Portraits. Medals, Books, and Natural History Specimens to commemorate the Centenary of his Birth and the Fiftieth Anniversary of the Publication of
Seite 179 - THE EVOLUTION. The physical changes undergone by the race are also clearly shown, as the paleontological series is very complete. These changes may thus be summarized : Increase in size and in the development of pillar-like limbs to support the enormous weight. Increase in size and complexity of the teeth and their consequent diminution in numbers and the development of the peculiar method of tooth succession. The loss of the canines and of all of the incisor teeth except the second pair in the upper...
Seite 151 - Experimental work conducted in the chemical laboratory of the United States fuel-testing plant, St. Louis, Mo., January 1, 1905, to July 31, 1906, by NW Lord.
Seite 187 - The forked lightnings gleamed all around, and loudest thunder rocked the globe. The bolts of heaven were hurled upon the cruel destroyers alone, and the mountains echoed with the bellowings of death. All were killed except one male, the fiercest of the race, and him even the artillery of the skies assailed in vain. He ascended the bluest summit which shades the source of the Monongahela, and, roaring aloud, bid defiance to every vengeance.
Seite 189 - ... respectively. Trilophodon (Figs. 195, D, D'; 202) is the third stage in proboscidean evolution, if we omit Dinotherium, and is well represented by the Miocene Trilophodon angustidens of which a splendid specimen from Gers, France, is preserved in the museum of the Jardin des Plantes at Paris (see Pl.
Seite 193 - Twigs of the existing conifer Thuia occidentalis were identified in the stomach of the New Jersey mastodon, while that of Newburg, New York, contained the boughs of some conifer, spruce or fir, also other not coniferous, decomposed wood. A newspaper account of the finding of the great Otisville mastodon, recently mounted at Yale, says that the region of the stomach contained " fresh-looking, very large leaves, of odd...
Seite 193 - Stegodon difti, for its transitional character is such that authorities differ as to whether it is a mastodon or an elephant. Stegodon. In Stegodon the molar teeth have more numerous ridges than in the true mastodons, and the name Stegodon is given because of the roof-like character of these ridges, the summits of which are subdivided into five or six small, rounded prominences. There is a thin layer of cement over the enamel in an unworn tooth, but no great accumulation in the intervening valleys...
Seite 186 - Ten thousands moons ago, when nothing but gloomy forests covered this land of the sleeping sun — -long before the pale man, with thunder and fire at his command, rushed on the wings of the wind to ruin this garden of nature — a race of animals were in being, huge as the frowning precipice, cruel as the bloody panther, swift as the descending eagle, and terrible as the angel of night. The pine crushed beneath their feet and the lakes shrunk when they slaked their thirst; the forceful javelin in...
Seite 152 - Tinton, given above, that in each fauna a considerable number of species have an extra-territorial distribution, and by far the larger number of these species which occur outside of New Jersey are known from the upper Cretaceous formations of the Gulf-border region, in the Ripley and associated formations of Alabama, Mississippi, Texas, ete.