The American Journal of Science and ArtsS. Converse, 1876 |
From inside the book
Results 1-5 of 72
Page 22
... experiments , let us plot Table X. once more , rejecting , however , the end observations and com- pleting the curve by the eye , thus getting rid of the error intro- duced at this point . We then find for this ratio , according to the ...
... experiments , let us plot Table X. once more , rejecting , however , the end observations and com- pleting the curve by the eye , thus getting rid of the error intro- duced at this point . We then find for this ratio , according to the ...
Page 32
... experiments was made as to their penetrating power , as to the most efficient pitch or tone , ( p . 95 ) , the effect of varying steam pressure from 20 pounds per square inch to 100 pounds per square inch , ( p . 97 ) , the material and ...
... experiments was made as to their penetrating power , as to the most efficient pitch or tone , ( p . 95 ) , the effect of varying steam pressure from 20 pounds per square inch to 100 pounds per square inch , ( p . 97 ) , the material and ...
Page 36
... experiments to believe " that snow , rain , fog . and the force and direction of the wind , have much less influence than has generally been supposed . " ( p . 104. ) This is in confir- mation of his previous observation [ C ] . III ...
... experiments to believe " that snow , rain , fog . and the force and direction of the wind , have much less influence than has generally been supposed . " ( p . 104. ) This is in confir- mation of his previous observation [ C ] . III ...
Page 42
... experiments the polariscope employed belonged to my friend , Dr. R. A. Witthaus . It was made by Laurent , of Paris , and read by verniers to two minutes . The tube was of glass 220 millimeters in length , with a lateral aperture near ...
... experiments the polariscope employed belonged to my friend , Dr. R. A. Witthaus . It was made by Laurent , of Paris , and read by verniers to two minutes . The tube was of glass 220 millimeters in length , with a lateral aperture near ...
Page 43
... experimental solutions which might be easily reproduced . They were , 1st , the use of the uncom- bined alkaloid ... experiments , and the result of seven hundred observations at temperatures between 25 ° C. and 47 ° C. gave figures ...
... experimental solutions which might be easily reproduced . They were , 1st , the use of the uncom- bined alkaloid ... experiments , and the result of seven hundred observations at temperatures between 25 ° C. and 47 ° C. gave figures ...
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Common terms and phrases
action alcohol amount angle appear beds boiled carbon Carboniferous cent character chloride chloritic chromosphere coal color containing Coryphodon Cretaceous crystals deposits described determined diameter Dinocerata direction distance earth Eocene examination experiments fact feet feldspar formation formula fossils genus Geological give grams heat hornblende Huronian hydrogen inches increase iron islands Journal Lake latter less limestone liquid lower magnet mass metallic meteorites miles mineral Miocene molecule Mountains nearly nitrate nitric acid O. C. MARSH observed obtained occur oxide paper plane plants plates portion present pressure probably produced Prof Professor pyroxene quantity reaction region remarkable Report River rocks salt samarskite sandstone schists seen shales Silurian solution sound species specimens strata structure substance sulphuric acid surface Survey temperature Tertiary thickness tion troilite tube upper veiled spots velocity volume wind Yale College
Popular passages
Page 405 - A Short History of Natural Science and of the Progress of Discovery, From the Time of the Greeks to the Present Time.
Page 293 - This reasoning applies word for word to the development of Bacteria from that floating matter which the electric beam reveals in the air, and in the absence of which no Bacterial life has been generated. There seems no flaw in this reasoning ; and it is so simple as to render it unlikely that the notion of Bacterial life developed from dead dust can ever gain currency among the members of a great scientific profession. A novel mode of experiment has been here pursued, and it may be urged that the...
Page 290 - Vacher reply that notwithstanding " an almost incalculable amount of patient labour, the actual results obtained, especially as regards the manner of generation of contagium, have been most disappointing. Observers are even yet at variance whether these minute particles, whose discovery we have just noticed, and other disease germs, are always produced from like bodies previously existing, or whether they do not, under certain favourable conditions, spring into existence de novo...
Page 57 - In whatever direction a body moves on the surface of the earth, there is a force arising from the earth's rotation, which deflects it to the right, in the northern hemisphere, but to the left, in the southern.
Page 290 - Into two other smaller apertures in the top of the cupboard are inserted, air-tight, the open ends of two narrow tubes, intended to connect the interior space with the atmosphere. The tubes are bent several times up and down, so as to intercept and retain the particles carried by such feeble currents as changes of temperature might cause to set in between the outer and the inner air.
Page 327 - Mr. Mason, a young and ardent astronomer, a native of the United States of America, whose premature death is the more to be regretted as he was (so far as I am aware) the only other recent observer who has given himself with the assiduity which the subject requires, to the exact delineation of Nebula;, and whose figures I find at all satisfactory.'^ He also prepared a college treatise on Practical Astronomy.
Page 292 - Briicke, dissolve clean gum mastic in alcohol, and drop it into water, the mastic is precipitated, and milkiness produced. If the solution be very strong the mastic separates in curds ; but by gradually diluting the alcoholic solution we finally reach a point where the milkiness disappears, the liquid assuming, by reflected light, a bright cerulean hue. It is, in point of fact, the colour of the sky, and is due to a similar cause, namely, the scattering of light by particles, small in comparison...
Page 227 - Our Place among Infinities : A Series of Essays contrasting our Little Abode in Space and Time with the Infinities Around us.
Page 292 - ... as certain as if they could be felt between the fingers or seen by the naked eye. Supposing them to augment in magnitude until they come, not only within range of the microscope, but within range of the unaided senses. Let it be assumed that our knowledge of them under these circumstances remains as defective as it is now — that we do not know whether they are germs, particles of dead organic dust, or particles of mineral matter. Suppose a vessel (say a flower-pot) to be at hand filled with...
Page 290 - My principal stimulus, however, was the desire to free my mind, and if possible the minds of others, from the uncertainty and confusion which now beset the doctrine of "spontaneous generation." Pasteur has pronounced it " a chimera," and expressed the undoubting conviction that, this being so, it is possible to remove parasitic diseases from the earth.