The Annual of Scientific Discovery, Or, Year-book of Facts in Science and ArtGould and Lincoln, 1860 |
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action alloys alumina ammonia amount animal animalcules apparatus appear atmosphere axle body bones breccia carbonic acid cast iron cause cellulose cent centre chemical chloride coal color containing copper cylinder decomposition deposits depth diameter earth effect electric engine existence experiments fact feet fibres fluid formation fossil furnace fusel oil geological glacier greensand Hadrosaurus heat hundred hydrogen inches increased less light lime limestone liquid magnesia mass matter metal miles minute motion nature nearly nitric acid observed obtained octahedron odor ordinary organic oxide oxygen paper parchment passing peroxide phosphorescent phosphorus plants plate plough portion potash pounds present pressure produced Prof proportion quantity reäction recently rocks side silica Silurian soda soil solution species specimens steam steel strata substance sulphate sulphuric acid surface temperature thick tion tons tube vegetable vessel weight wheel wire wood zinc
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Página 348 - ... coprolites, and human objects, was agglutinated to the roof by the infiltration of water holding lime in solution. That subsequently, and within the human period, such a great amount of change took place in the physical configuration of the district as to have caused the cave to be washed out and emptied of its contents, excepting the patches of material cemented to the roof and since coated with additional stalagmite.
Página 330 - ... of any gradual diminution of the size of such species, but is the result of circumstances, which may be illustrated by the fable of the ' Oak and the Reed ; ' the smaller and feebler animals have bent and accommodated themselves to changes which have destroyed the larger species.
Página viii - ... give rise to races and permanent varieties in animals and plants, are the same as those which in much longer periods produce species, and in a still longer series of ages give rise to differences of generic rank. He appears to me to have succeeded by his investigations and reasonings in throwing a flood of light on many classes of phenomena connected with the affinities, geographical distribution, and geological succession of organic beings, for which no other hypothesis has been able, or has...
Página 330 - ... a geometrical ratio, to the bulk of the species. If a dry season be gradually prolonged, the large mammal will suffer from the drought sooner than the small one ; if such alteration of climate affect the quantity of vegetable food, the bulky Herbivore will first feel the effects of stinted nourishment ; if new enemies are introduced, the large and conspicuous quadruped or bird will fall a prey, whilst the smaller species conceal themselves and escape. Smaller animals are usually, also, more prolific...
Página 424 - The Geology of Pennsylvania. A Government survey, with a general view of the Geology of the United States, Essays on the Coal Formation and its Fossils, and a description of the Coal Fields of North America and Great Britain.
Página viii - Somme, for the deposition of fine sediment, including entire shells, both terrestrial and aquatic, and also for the denudation which the entire mass of stratified drift has undergone : portions having been swept away, so that what remains of it often terminates abruptly in old river cliffs, besides being covered by a newer unstratified drift. To explain these changes, I should infer considerable oscillations in the level of the land in that part of France ; slow movements of upheaval and subsidence,...
Página 330 - ... species has to maintain against the surrounding agencies that are ever tending to dissolve the vital bond and subjugate the living matter to the ordinary chemical and physical forces. Any changes, therefore, in such external...
Página 56 - If the rectangular notch is to be made wide enough to allow the water to pass in flood times, it must be so wide that for long periods, in moderately dry weather, the water flows so shallow over its crest, that its indications cannot be relied on.