The American Journal of Science and ArtsS. Converse, 1854 |
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Página 16
... natural meadows . The culminating points reach nearly twelve hundred feet above Lake Superior or eighteen hundred feet above the ocean - level . We commence our description of the local phenomena of this system of rocks where they ...
... natural meadows . The culminating points reach nearly twelve hundred feet above Lake Superior or eighteen hundred feet above the ocean - level . We commence our description of the local phenomena of this system of rocks where they ...
Página 36
... natural size . It is to be understood however that these were unquestionably smaller than many which we saw fall . The rain , accompanied by thunder and lightning , continued for six or eight minutes , when its violence somewhat abated ...
... natural size . It is to be understood however that these were unquestionably smaller than many which we saw fall . The rain , accompanied by thunder and lightning , continued for six or eight minutes , when its violence somewhat abated ...
Página 62
... natural science , and , from the days of the earlier ob- servers , they have been the theme of a kind of wonder - story in zoology and physiology . I need not here go over the historical relations of this subject . The queer experiments ...
... natural science , and , from the days of the earlier ob- servers , they have been the theme of a kind of wonder - story in zoology and physiology . I need not here go over the historical relations of this subject . The queer experiments ...
Página 82
... natural groups , to a considerable extent , and a very interesting exhibition of the relations of the species is afforded . If any objection can be made to this arrangement , it is one that science is not at present able wholly to ...
... natural groups , to a considerable extent , and a very interesting exhibition of the relations of the species is afforded . If any objection can be made to this arrangement , it is one that science is not at present able wholly to ...
Página 92
... Natural History of the Acalephæ of North America , in the Memoirs Amer . Acad . Arts and Sc . , 1850 , N. S. , iv , pt . îì , p . 239 . kind . But in the three classes of the Articulata 92 Reviews and Records in Anatomy and Physiology .
... Natural History of the Acalephæ of North America , in the Memoirs Amer . Acad . Arts and Sc . , 1850 , N. S. , iv , pt . îì , p . 239 . kind . But in the three classes of the Articulata 92 Reviews and Records in Anatomy and Physiology .
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acid anal Andalusite angle animals appears atomic weights auroral auroral light axis beds body carbonate cavities character chlorine cleavage color contain crystalline crystals cylinder deposits diameter distinct dorsal elements equal Esox examination fact feet feldspar fishes flora formation formula fossils gale genera genus geological globules heat hornblende hydrogen Idocrase inches iron islands isomorphism known Lake layers less light lime limestone lines lower magnetic Malpighian body mass means metal microscope miles mineral natural nearly object observed obtained occur octahedron organic oxyd oxygen peculiar plane plants portion potash present pressure prism Prof quartz Rafinesque ratio regard relation remarkable resembles river rocks sandstone Scapolite SECOND SERIES Section seen Sept side silica Silurian species specific gravity specimens structure substance sulphur surface temperature thickness tion trace tube upper vertical viviparous whole wire Wolffian bodies Zealand
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Página 157 - Illustrations | of the | Birds | of | California, Texas, Oregon, British and | Russian America. | Intended to contain descriptions and figures | of all | North American Birds | not given by former American authors, | and a | General Synopsis of North American Ornithology.
Página 455 - Synopsis of the Marine Invertebrata of Grand Manan : or the region about the mouth of the Bay of Fundy, New Brunswick.
Página iii - Report on the geology of the Lake Superior land district : by JW Foster and JD Whitney, United States Geologists. Part II.
Página 301 - Manual of Natural History for the Use of Travellers ; being a Description of the Families of the Animal and Vegetable Kingdoms, with Remarks on the Practical Study of Geology and Meteorology. To which are appended Directions for Collecting and Preserving. By ARTHUR ADAMS. MRCS ; W.
Página 91 - And in regard to long circuits such as those described, their conducting power cannot be understood, whilst no reference is made to their lateral static induction, or to the conditions of intensity and quantity which then come into play ; especially in the case of short or intermitting currents, for then static and dynamic are continually passing into each other.
Página 381 - In the chick no traces of the kidney are perceptible, according to my own observations, until the end of the fourth or the beginning of the fifth day. The ureter, then, is the part first seen, and consists of a simple tube, the upper part of which sends off branches.
Página 94 - ... the same voltaic source, the same current in the same length of the same wire gives a different result as the intensity is made to vary with -variations of the induction around the wire. The idea of intensity, or the power of overcoming resistance, is as necessary to that of electricity, either static or current, as the idea of pressure is to steam in a boiler, or to air passing through apertures or tubes, and we must have language competent to express these conditions and these ideas.
Página 76 - ... perception of which is deeply connected with our highest appreciation of individual animal life.* A true generation must be regarded as resulting only from the conjugation of two opposite sexes — from a sexual process in which the potential representations of two individuals are united for the elimination of one germ.
Página 340 - ZEALAND. 4. These three peculiarities are shared by all the islands in the south temperate zone (including even Tristan d'Acunha, though placed so close to Africa), between which islands the transportation of seeds is even more unlikely than between the larger masses of land. 5. The plants of the Antarctic islands, which are equally natives of New Zealand, Tasmania, and Australia, are almost invariably found only on the lofty mountains of these countries.
Página 69 - ... as already mentioned. Moreover, these rows of germs, which, at one period, closely resemble in general form the ovaries of some true insects, are not continuous with any uterine or other female organ, and therefore do not at all communicate directly with the external world. On the other hand, they are simply attached to the inner surface of the animal, and their component germs are detached into the abdominal cavity as fast as they are developed, and then escape outwards through a...