The American Journal of Science and ArtsS. Converse, 1869 |
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Сторінка v
... Observations upon Autumnal Foliage ; by JOSEPH WHARTON , 242 251 XXII . - On a Modified Form of the Nitrate of Silver Test for Arsenic Acid ; by CHARLES E. AVERY , - XXIII . - Notices of papers in Physiological Chemistry ; by GEORGE F ...
... Observations upon Autumnal Foliage ; by JOSEPH WHARTON , 242 251 XXII . - On a Modified Form of the Nitrate of Silver Test for Arsenic Acid ; by CHARLES E. AVERY , - XXIII . - Notices of papers in Physiological Chemistry ; by GEORGE F ...
Сторінка vi
... Observations ; by WILLIAM A. ROGERS , XXVI . - Upon the Atomic Volumes of the Elements ; by FRANK WIGGLESWORTH ... Observing the vi CONTENTS .
... Observations ; by WILLIAM A. ROGERS , XXVI . - Upon the Atomic Volumes of the Elements ; by FRANK WIGGLESWORTH ... Observing the vi CONTENTS .
Сторінка 30
... observations , he now asserts that the condition of the blood after death cannot be taken as an indication of its state in life . He finds that in blood drawn from the right ventricle of an animal in a tranquil state , hardly a trace of ...
... observations , he now asserts that the condition of the blood after death cannot be taken as an indication of its state in life . He finds that in blood drawn from the right ventricle of an animal in a tranquil state , hardly a trace of ...
Сторінка 33
... observation , by which , indeed , among other acquisitions to science , Comparative Osteology had been created . Campert and Hunter suspected that species might be transitory ; but Cuvier , in defining the characters of his ...
... observation , by which , indeed , among other acquisitions to science , Comparative Osteology had been created . Campert and Hunter suspected that species might be transitory ; but Cuvier , in defining the characters of his ...
Сторінка 35
... observations and comparisons accu- mulated , with pari passu tests of observed phenomena of oste- ogeny , they enforced a reconsideration of Cuvier's conclusions to which I had previously yielded assent . To demonstrate the evidence of ...
... observations and comparisons accu- mulated , with pari passu tests of observed phenomena of oste- ogeny , they enforced a reconsideration of Cuvier's conclusions to which I had previously yielded assent . To demonstrate the evidence of ...
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alcohol ammonia angle animal appears arsenic atomic volume blood blue boiling bromine carbon carbonic acid cent chlorid chromium chyle color containing convergence corresponding Cotopaxi crystals deposits dextrin diagram direction distance distillation elements Eocene exist experiments fact feet filter formation fossil gives glass glycogenic matter heat Hipparion horizontal Horopter Huggins's scale hydrogen inches inclined iodine iron island Kirchhoff's scale light liquid compounds liver lower mass metal meteor method miles Miocene nearly nitric acid nitrogen observations obtained optic organic oxyd oxygen paper pass personal equation point of sight portion position precipitate present probably produced Prof pumice quantity rays remarkable river rocks rotation salt Sandstone seen Slates solution species specific gravity specimens substance sugar sulphur surface temperature tion trachyte tube vapor volumes vertical visual plane wave lengths
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Сторінка 53 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Сторінка 270 - Annual Report of the Trustees of the Museum of Comparative Zoology, at Harvard College, in Cambridge, together with the Report of the Director, 1867.
Сторінка 46 - In North America the black bear was seen by Hearne swimming for hours with widely open mouth, thus catching, like a whale, insects in the water. Even in so extreme a case as this, if the supply of insects were constant, and if better adapted competitors did not already exist in the country, I can see no difficulty in a race of bears being rendered, by natural selection, more and more aquatic in their structure and habits, with larger and larger mouths, till a creature was produced as monstrous as...
Сторінка 47 - ... of the year when food was scarcest; they would also rear more young, which would tend to inherit these slight peculiarities. The less fleet ones would be rigidly destroyed. I can see no more reason to doubt that these causes in a thousand generations would produce a marked effect, and adapt the form of the fox or dog to the catching of hares instead of rabbits, than that greyhounds can be improved by selection and careful breeding.
Сторінка 51 - Not one hour old, yet of sciential brain To unperplex bliss from its neighbour pain ; Define their pettish limits, and estrange Their points of contact, and swift counterchange ; Intrigue with the specious chaos, and dispart Its most ambiguous atoms with sure art ; As though in Cupid's college she had spent Sweet days a lovely graduate, still unshent, And kept his rosy terms in idle languishment.
Сторінка 51 - So, being unable to accept the volitional hypothesis, or that of impulse from within, or the selective force exerted by outward circumstances, I deem an innate tendency to deviate from parental type, operating through periods of adequate duration, to be the most probable nature, or way of operation, of the secondary law, whereby species have been derived one from the other.
Сторінка 3 - Some augmened the number of loud reports, and terror and imagination seem, in various instances, to have magnified every circumstance of the phenomenon. The only thing which seemed of any importance beyond this statement, was derived from Mr, Elihu Staples, who said, that when the meteor disappeared, there were apparently three successive efforts or leaps of the fireball, which grew more dim at every throe, and disappeared with the last.
Сторінка 52 - A purposive route of development and change, of correlation and interdependence, manifesting intelligent Will, is as determinable in the succession of races as in the development and organization of the individual. Generations do not vary accidentally, in any and every direction ; but in preordained, definite, and correlated courses.
Сторінка 256 - ... they are parallel with the longer sides. Often these lines do not reach the middle of the figure, where only a confused crystallization can be detected. In the interior of the elongated figures the lines are quite irregular, often running together and showing a striking resemblance to woody fiber. The nature of these markings may be easily understood. They indicate the axes of minute columnar crystals, which tend to assume a position at right-angles to the surface of cooling.
Сторінка 135 - It has been shown that finely divided gold is soluble in the sesquichlorid of iron and, more sparingly, in the sesquisulphate of that metal. It is also well known that iron pyrites sometimes results from the action of reducing agents on the sulphates of that metal. If therefore sulphate of iron, in a solution containing gold, should become transformed by the action of a reducing agent into pyrites, the gold at the same time being reduced to the metallic state, would probably be found enclosed in...