The American Journal of Science and Arts, Volúmenes77-78S. Converse, 1859 |
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Página 34
... organic remains near the junction , we were in doubt respecting the particular horizon at which the line should be drawn between them . At the same time , we stated that the beds from which the Jurassic fossils , described by us were ...
... organic remains near the junction , we were in doubt respecting the particular horizon at which the line should be drawn between them . At the same time , we stated that the beds from which the Jurassic fossils , described by us were ...
Página 66
... organic remains , as well as the greater ; a circumstance in which he strongly resembled his friend and fellow - laborer , Dr. Buckland . For an exemplification of this peculiarity of his mind , I shall refer to his paper pub- lished in ...
... organic remains , as well as the greater ; a circumstance in which he strongly resembled his friend and fellow - laborer , Dr. Buckland . For an exemplification of this peculiarity of his mind , I shall refer to his paper pub- lished in ...
Página 67
... organic phenomena in connexion with geo- logical science ; and it is truly surprising how often the intimate connexion of the physical geography of remote epochs with their natural history is overlooked . His description of the land ...
... organic phenomena in connexion with geo- logical science ; and it is truly surprising how often the intimate connexion of the physical geography of remote epochs with their natural history is overlooked . His description of the land ...
Página 70
... organic remains , yet reduced to certainty and order what had been before vague and conjectural ; the gradual rise of the Tertiary Geology from its foundation in the admirable " Memoir on the Basin of Paris , " by Cuvier and Brongniart ...
... organic remains , yet reduced to certainty and order what had been before vague and conjectural ; the gradual rise of the Tertiary Geology from its foundation in the admirable " Memoir on the Basin of Paris , " by Cuvier and Brongniart ...
Página 107
... organic forms , and we have , up to this time , no evidence of the existence of organic remains below this formation . Lower Magnesian Limestone . - This is a mass of dolomite , hav- ing a thickness of from 225 to 250 feet , about 200 ...
... organic forms , and we have , up to this time , no evidence of the existence of organic remains below this formation . Lower Magnesian Limestone . - This is a mass of dolomite , hav- ing a thickness of from 225 to 250 feet , about 200 ...
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Términos y frases comunes
abundant acid alumina American ammonia analysis angle animal appears beds carbonate of lime carbonic acid Carboniferous chlorid clay coal coast color comet containing copper Cretaceous crystalline crystals density deposits epidote euphotide experiments fact feet feldspar flora formation Fort Riley fossils Fusulina genera genus geological gives heat hornblende inches iron islands Lake land latitude lava less limestone liquid magnesia mass matter miles mineral Miocene mountains mouth nearly North nucleus observations obtained occur ocean organic oxyd oxygen Permian peroxyd pieces plants plates polarized portion potash precipitate present Prof protoxyd pyroxene quantity quartz region remarkable river rocks salt sandstone saussurite SECOND SERIES seen shock side silica Silurian Smoky Hill river soda solution species specific gravity specimens stauroscope strata stream sulphate sulphuric surface Survey temperature tetradymite theory thickness tion trace tube upper XXVII
Pasajes populares
Página 449 - ... 5. This work has conferred many valuable benefits upon science, indirectly and incidentally, in the invention or perfection of instruments, in the improvement of methods of observation or of computation, in the development which it has given to special subjects of interesting inquiry, and in the stimulus which it has furnished to the scientific talent of the country, especially in the field of astronomical observation and investigation. 6. A careful study of the progress made from year to year,...
Página 128 - 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 51 - The Principia will ever remain a monument of the profound genius which revealed to us the greatest law of the universe,"* are the words of Laplace. " That work stands pre-eminent above all the other productions of the human mind. -(- " The discovery of that simple and general law by the greatness and the variety of the objects which it embraces confers honour upon the intellect of man.
Página 233 - Description of nine new species of Crinoidea from the Subcarboniferous rocks of Indiana and Kentucky, Am.
Página 13 - ... besides some nearly mature foetuses contained in the mouth, two or three were squeezed apparently from the stomach; but not bearing any marks of violence, or of the action of the gastric fluid. It is probable that these found their way into that last cavity after death, in consequence of the relaxation of the sphincter which separates the cavities of the mouth and the stomach.
Página 195 - Agassiz maintains, substantially, that each species originated where it now occurs, probably in as great a number of individuals occupying as large an area, and generally the same area, or the same discontinuous areas, as at the present time.
Página 147 - Sir Humphry Davy gave me the analysis to make as a first attempt in chemistry, at a time when my fear was greater than my confidence, and both far greater than my knowledge ; at a time, also, when I had no thought of ever writing an original paper on science.
Página 105 - Wherever there has been a variation from the usual conditions of the soil, on the prairie or in the river bottom, there is a corresponding change in the character of the vegetation. Thus, on the prairies we sometimes meet with ridges of coarse material, apparently deposits of drift, on which, from some local cause, there has never been an accumulation of fine sediment; in such localities we invariably find a growth of timber. This is the origin of the groves scattered over the prairies, for whose...
Página 294 - ... expect to find near by those products of the chemical changes effected in the coal. Such is the delicacy of the balance existing between the elements of the heavy hydrocarbons, that no second distillation of them can be effected; they always undergo decomposition by heat, with the separation of carbon, which, under any known natural conditions, would remain to attest their previous presence. Considerations of this kind have led me to experiment on the changes which coals undergo by heat, where...
Página 424 - Hobson, RN, Captain Allen Young, and myself. As a somewhat detailed report of our proceedings will doubtless be interesting to their Lordships, it is herewith enclosed, together with a chart of our discoveries and explorations, and at the earliest opportunity I will present myself at the Admiralty to afford further information, and lay before their Lordships the record found at Port Victory. I have, &c., FL M'CLINTOCK, Captain, RN To the Secretary of the Admiralty, London.