The American Journal of Science and Arts

Portada
S. Converse, 1860

Dentro del libro

Contenido

The Great Auroral Exhibition of August 28th to Septem
92
Remarks on the Dissolution of Field Ice by CHAS WHIT
111
Chemistry and Physics On Platinum and the metals which accompany it 113 Blow
114
GeologyReview On some points in the Geology of the Alps 118 The Geological
126
Total Solar
139
111
142
Miscellaneous Scientific Intelligence Inquiries into the Phenomena of Respiration
146
Review of Darwins Theory on the Origin of Species
153
Forces by THEODORE LYMAN
185
Gulf Stream ExplorationsThird Memoir Distribution
199
On the Chemical Composition of Pectolite by J D WHITNEY
205
Abstract of a Meteorological Journal kept at Marietta
218
Calceola
248
Correspondence of Mr JEROME NICKLESBiography
268
Chemistry and Physics On two new series of Organic Acids HEINTZ 272 On
276
Technical Chemistry Vegetable ParchmentPapyrine 278 Weighing of Moist Pre
282
Zoology On Botanical and Zoological Nomenclature by WM STIMPSON 289 Les gen
294
Mr Alvan Clarks
300
On the Coloring Matter of the Privet and its applica
326
Report of Assistant Charles A Schott on the latest
335
Caricography by Prof C DEWEY
346
Ornithichnites or tracks resembling those of Birds
361
Theoretical Determination of the Dimensions of
383
Geographical Notices by DANIEL C GILMAN No XII
400
Correspondence of Prof JEROME NICKLES French
414
Description of an Equatorial recently erected at Hope
421
Chemistry and Physics On Fraunhofers Lines KIRCHOFF 423 On the direct conver
427
Geology Notes on the Geology of Nebraska and Utah Territory by Dr F V HAYDEN
434
Primite Flora Amu
441
Meteorology and Astronomy Abstract of Meteorological Observations at Sacramento
447

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Página 172 - I cannot doubt that the theory of descent with modification embraces all the members of the same great class or kingdom. I believe that animals are descended from at most only four or five progenitors, and plants from an equal or lesser number.
Página 144 - As all the living forms of life are the lineal descendants of those which lived long before the Cambrian epoch, we may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world. Hence we may look with some confidence to a secure future of great length. And as natural selection works solely by and for the good of each being, all corporeal and mental endowments will tend to progress towards perfection.
Página 143 - Judging from the past, we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity. And of the species now living very few will transmit progeny of any kind to a far distant futurity...
Página 154 - The limbs divided into great branches, and these into lesser and lesser branches, were themselves once, when the tree was...
Página 166 - There is no exception to the rule that every organic being naturally increases at so high a rate that, if not destroyed, the earth would soon be covered by the progeny of a single pair.
Página 166 - Nothing is easier than to admit in words the truth of the universal struggle for life, or more difficult — at least I have found it so — than constantly to bear this conclusion in mind.
Página 170 - But if variations useful to any organic being ever do occur, assuredly individuals thus characterised will have the best chance of being preserved in the struggle for life ; and from the strong principle of inheritance, these will tend to produce offspring similarly characterised. This principle of preservation, or the survival of the fittest, I have called Natural Selection.
Página 155 - ... in a fossil state. As we here and there see a thin straggling branch springing from a fork low down in a tree...
Página 445 - THE BOYDEN PREMIUM URIAH A. BOYDEN, ESQ., of Boston, Mass., has deposited with THE FRANKLIN INSTITUTE the sum of one thousand dollars, to be awarded as a premium to "Any resident of North America who shall determine by experiment whether all rays of light,* and other physical rays, are or are not transmitted with the same velocity.
Página 154 - The green and budding twigs may represent existing species ; and those produced during former years may represent the long succession of extinct species. At each period of growth all the growing twigs have tried to branch out on all sides, and to overtop and kill the surrounding twigs and branches, in the same manner as species and groups of species have at all times overmastered other species in the great battle for life.

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