The American Journal of Science and Arts

S. Converse, 1860

Dentro del libro

Comentarios de la gente - Escribir un comentario

No encontramos ningún comentario en los lugares habituales.


The Great Auroral Exhibition of August 28th to Septem
On Numerical Relations existing between the Equivalent
Remarks on the Dissolution of Field Ice by Chas Whit
Chemistry and Physics On Platinum and the metals which accompany it 113 Blow
Geology of the Alps 118 The Geological
Bolany and Zoology Collection of Cuban Plants 127 Systematic Arrangement of
of Science 133 An essay on Classification
Total Solar
Review of Darwins Theory on the Origin of Species
Forces by Theodore LYMAN
Dr J S NEWBERRY In a letter to Prof Dana
Technical Chemistry Vegetable ParchmentPapyrine 278 Weighing of Moist
Zoology On Botanical and Zoological Nomenclature by WM STIMPSON 289 Les
of the Meteor of Nov 15 1859 by Prof
Mr Alan Clarks
On the Coloring Matter of the Privet and its applica
Report of Assistant Charles A Schott on the latest
Caricography by Prof C Dewey
Ornithichnites or tracks resembling those of Birds
Theoretical Determination of the Dimensions of
Geographical Notices by DANIEL C Gilman No XII
Correspondence of Prof JEROME NICKLČS French
Description of an Equatorial recently erected at Hope
Chemistry and Physics On Fraunhofers Lines KirchOFF 423 On the direct conver
Geology Notes on the Geology of Nebraska and Utah Territory by Dr F V HAYDEN
Dr Thomas Ilorsefield A L S Lejeune Thomas Nuttall 441
Meteorology and Astronomy Abstract of Meteorological Observations at Sacramento
Notes on the Habits of the Common Cane Arundinaria

Otras ediciones - Ver todas

Términos y frases comunes

Pasajes populares

Página 176 - 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 148 - 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 147 - 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 158 - The limbs divided into great branches, and these into lesser and lesser branches, were themselves once, when the tree was...
Página 170 - 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 170 - 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 174 - 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 159 - ... in a fossil state. As we here and there see a thin straggling branch springing from a fork low down in a tree...
Página 449 - 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 158 - 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.

Información bibliográfica