The American Naturalist, Volumen30Essex Institute, 1896 |
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Página 8
... side , we encounter the following principal question : Does death from inner causes occur in Protozoa ? Weismann gives a negative answer to this ques- tion , with his assertion that unicellular organisms are immor- tal . The assertion ...
... side , we encounter the following principal question : Does death from inner causes occur in Protozoa ? Weismann gives a negative answer to this ques- tion , with his assertion that unicellular organisms are immor- tal . The assertion ...
Página 26
... side of the eye , the aqueous chamber again pierced and all aqueous and vitreous humor allowed to run out . In some animals this humor is very much more gel- atinous than in others , and re- quires much more pressure to remove it . The ...
... side of the eye , the aqueous chamber again pierced and all aqueous and vitreous humor allowed to run out . In some animals this humor is very much more gel- atinous than in others , and re- quires much more pressure to remove it . The ...
Página 31
... side of the entrance of the optic nerve ( fovea nasalis ) , while in others it is on the temporal side ( fovea temporalis ) . According to Müller , in the former case we have monocular vision , while in the latter we have binocular ...
... side of the entrance of the optic nerve ( fovea nasalis ) , while in others it is on the temporal side ( fovea temporalis ) . According to Müller , in the former case we have monocular vision , while in the latter we have binocular ...
Página 37
... side of physiography than toward physical geography . The book is indeed elementary - more so than one would wish , sometimes ; at other times it is elementary in the statement of the facts described , while leaving their causes ...
... side of physiography than toward physical geography . The book is indeed elementary - more so than one would wish , sometimes ; at other times it is elementary in the statement of the facts described , while leaving their causes ...
Página 45
... side of the contact the rock becomes charged with silicates , the most abundant of which are hornblende , phlogopite , light green pyroxenes , sphene , spinel , chondrodite , vesuvianite , etc. The contact effects are similar in ...
... side of the contact the rock becomes charged with silicates , the most abundant of which are hornblende , phlogopite , light green pyroxenes , sphene , spinel , chondrodite , vesuvianite , etc. The contact effects are similar in ...
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Términos y frases comunes
acid adaptations Amer American animals appear augite bacteria beds beets BESSEY birds body bones Botany brain Bull cells Ceratops changes characters color containing Cope described diabases Diplopoda disease eggs embryo Eocene evidence evolution experiments Extr fact fauna Flora fossil gabbro gastrula gelatine genera genus Geol Geological gneisses heredity hornblende Hyracotherium insects Journ Lacertilia larvæ latter legs length less limestone ment molars movements Museum mushroom bodies natural NATURALIST North observed occur organism original orthoclase ovum paper paroccipital phenocrysts plagioclase plants plates porphyritic premolar present probably Prof Professor protoplasm Protozoa quartz recent region relation rocks Science segment selection skull species specimens spores sporophylls squamosal stage stain stem structure subspecies substance surface tail theory tion tissues University upper variations vegetative Weismann
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Página 326 - KOREAN GAMES: WITH NOTES ON THE CORRESPONDING GAMES OF CHINA AND JAPAN, Stewart Culin.
Página 419 - Their houses are mats or barks of trees, set on poles, in the fashion of an English barn, but out of the power of the winds, for they are hardly higher than a man ; they lie on reeds or grass.
Página 905 - Its power of inducing fermentation in a solution of sugar was entirely destroyed, although no perceptible change in the appearance of the yeast cells could be detected under the microscope. This experiment was repeated several times, and always with the same result, although when the yeast was simply washed in water it readily induced fermentation.
Página 181 - Consequently, if the theory be true, it is indisputable that before the lowest Cambrian stratum was deposited, long periods elapsed, as long as, or probably far longer than, the whole interval from the Cambrian age to the present day; and that during these vast periods the world swarmed with living creatures.
Página 841 - With this the priest disappeared. I awoke at once, and immediately told my wife the dream, that I might not forget it. Next morning — Sunday — I examined the fragments once more in the light of these disclosures, and to my astonishment found all the details of the dream precisely verified in so far as the means of verification were in my hands. The original inscription on the votive cylinder read: 'To the god Ninib, son of Bel, his lord, has Kurigalzu, pontifex of Bel, presented this.
Página 854 - Lewiston the river was crossed in a steamboat, and the trolley line up the river carried the party past the rapids and the whirlpool, of which magnificent views were obtained. After dinner at the International Hotel, the establishments of the Power Company and of the Carborundum Company were examined, and the company returned to Buffalo. SCIENTIFIC NEWS. Dr. G. Brown Goode, Assistant Secretary of the Smithsonian Institution and Director of the National Museum, died in Washington, Sept. 6th. Dr. Goode...
Página 842 - I was awakened from sleep by a sigh, immediately thereafter heard a spring from the bed, and at the same moment saw Professor Hilprecht hurrying into his study. Thence came theory, ' It isso.it is so ! ' Grasping the situation, I followed him and satisfied myself in the midnight hour as to the outcome of his most interesting dream.
Página 525 - This then is a form of ontogenetic adaptation ; it keeps these creatures alive, and so produces determinate variations in the way explained above. It is, therefore, a special, and from its wide range, an extremely important instance of the general principle of Organic Selection. But it has a farther value. It keeps alive a series of functions which either are not yet, or never do become, congenital at all. It is a means of extra-organic transmission from generation to generation. It is really a form...
Página 502 - ... on the way to Pawtucket; he wanted to get away somewhere — he didn't know where — and have rest. He had six or seven hundred dollars with him when he went into the store. He lived very closely, boarded by himself, and did his own cooking. He went to church, and also to one prayer-meeting. At one of these meetings he spoke about a boy who had kneeled down and prayed in the midst of the passengers on a steamboat from Albany to New York [an incident of which he was well aware in the Ansel Bourne...
Página 534 - ... whose existence is threatened by dangers of contact and what not, the first thing to do is to secure a regular supply to the nutritive processes, and to avoid these contacts. But the organism can do nothing but move, as a whole or in some of its parts. So then if one of such creatures is to be fitter than another to survive, it must be the creature which by its movements secures more nutritive processes and avoids more dangerous contacts. But movements toward the source of stimulation keep hold...