The American Journal of Science and ArtsS. Converse, 1847 |
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Página 1
... magnetic may be deduced from the thermal elements of the earth . The first investigations tending to establish the ... magnetic poles ; and maintained the proba- bility of some physical connection between the poles of maxi- mum cold ...
... magnetic may be deduced from the thermal elements of the earth . The first investigations tending to establish the ... magnetic poles ; and maintained the proba- bility of some physical connection between the poles of maxi- mum cold ...
Página 2
... magnetic equator are connected , as Sir David Brewster had already proved to be the case with the thermal and magnetic poles ; also , " that in comparing the isothermal and isodynamic lines , he had found a remarkable analogy in their ...
... magnetic equator are connected , as Sir David Brewster had already proved to be the case with the thermal and magnetic poles ; also , " that in comparing the isothermal and isodynamic lines , he had found a remarkable analogy in their ...
Página 3
... magnetic needle are subject to the action of the magnetic force of the earth , is evident from the fact that the directive force of the needle is proportional to its mass . Why it is that magnets alone are sensi- bly influenced by the ...
... magnetic needle are subject to the action of the magnetic force of the earth , is evident from the fact that the directive force of the needle is proportional to its mass . Why it is that magnets alone are sensi- bly influenced by the ...
Página 4
... magnetic force exerted tangentially to the circumference of every vertical circle that may be conceived to be tra- ced around it . Thus , if A , fig . 1 , be a particle of the earth's mass at or near the surface , P a particle of a magnetic ...
... magnetic force exerted tangentially to the circumference of every vertical circle that may be conceived to be tra- ced around it . Thus , if A , fig . 1 , be a particle of the earth's mass at or near the surface , P a particle of a magnetic ...
Página 5
... magnetic states of the two ends of the needle . 3. The intensity of the magnetic force of a particle of the earth , at a given distance , is assumed to be approximately propor- tional to its temperature , or amount of sensible heat ...
... magnetic states of the two ends of the needle . 3. The intensity of the magnetic force of a particle of the earth , at a given distance , is assumed to be approximately propor- tional to its temperature , or amount of sensible heat ...
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action alcohol ammonia angle animal appear attraction axes baryta beak beds benzoic acid bodies carbonic acid cent character chlorid cleavage color columbite compounds contains copper crystals deposits determined direction dissolved distance earth elements eocene equal equivalent error ether experiments fact feet force formula fossil genus geological glycocoll gun-cotton Gutta Percha heat hippuric acid hydrochloric acid hydrogen inches intensity iron Lake latitude length less light liquid magnetic manganese mass matter meridian metal miles molecules muscular impression nature nearly needle nitric acid observed obtained organic oxyd oxygen plane plants platinum poles portion posterior potash present produced Prof quantity R. I. Murchison remarkable river rock salt sandstone Schk SECOND SERIES side solution species specimens strata structure substance sulphate sulphuretted sulphuric acid surface temperature thickness tion trap trees vegetable vertebra vertical wire
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Página 456 - Outlines of the Course of Qualitative Analysis followed in the GIESSEN LABORATORY. By HENRY WILL, Ph. D., Professor Extraordinary of Chemistry in the University of Giessen. With a Preface by BARON LIEBIG. 8vo, 6s., or with the Tables mounted on linen, 7».
Página 448 - The full-grown condor measures, from the point of the beak to the end of the tail, from...
Página 152 - Descriptions of fossil shells of the collections of the Exploring Expedition under the command of Charles Wilkes, USN, obtained in Australia, from the lower layers of the coal formation in Illawarra, and from a deposit probably of nearly the same age at Harper's Hill, valley of the Hunter. (American journal of science and arts. New Haven, 1847. 8°. series 2, v. 4, p. 151-160.) OA 324. Fossils of the Exploring Expedition under the command of Charles Wilkes, USN: a fossil fish from Australia, and...
Página 248 - He lives with pleasure, and he dies with pain. I am aware that the doctrine assumed in the first line of the couplet in reference to the particular insect is denied by some naturalists ; and that the fact assumed in the last line, in reference to the lower animals, is denied by others. Whatever be the truth as to the first point, I have no more doubt than I have of my own existence...
Página 448 - Cordillera that bird builds its nest, and hatches its young in the months of April and May. Few animals have attained so universal a celebrity as the condor. That bird was known in Europe at a period when his native land was numbered among those fabulous regions which are regarded as the scenes of imaginary wonders. The most extravagant accounts of the condor were written and read, and general credence was granted to every story which travellers brought from the fairy land of gold and silver. It...
Página 447 - Coco." The light given out by a few of these fungi, in a dark room, was sufficient to read by. It proved to be quite a new species ; and since my return from Brazil, has been described by the Rev.
Página 126 - Yet the attempt to explain, by the Cuvierian principles, the facts of special homology on the hypothesis of the subserviency of the parts so determined to similar ends in different animals...
Página 149 - This is a useful compendium of all that description of information which is valuable to the modern gardener. It quotes largely from the best standard authors, journals. and transactions of societies; and the labours of the American editor have fitted it for the United States, by judicious additions and omissions.
Página 447 - One dark night, about the beginning of December, while passing along the streets of the Villa de Natividade, I observed some boys amusing themselves with some luminous object, which I at first supposed to be a kind of large fire-fly ; but on making inquiry, I found it to be a beautiful phosphorescent fungus, belonging to the genus Agaricus, and was told that it grew abundantly in the neighbourhood on the decaying leaves of a dwarf palm.
Página 18 - Siberian rhinoceros, had hinted, that ' the kind of food which the existing species of elephant prefers will not enable us to determine, or even to offer a probable conjecture, concerning that of the extinct species. No one,' he said, ' acquainted with the gramineous character of the food of our fallow-deer, stag, or roe, would have assigned a lichen to the reindeer.