Transactions of the American Philosophical Society, Том 6American Philosophical Society, 1809 Held at Philadelphia for promoting useful knowledge. |
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Страница xxxii
... acid in the scarlet fever , London , 1804 , 8vo . -Reports and proceedings & c . of the Delaware and Chesapeak canal company , 8vo . Hamilton ( William ) Samtliche Papierversuche ; nebst mustern und Kupfertafeln , von J. C. Schaffers ...
... acid in the scarlet fever , London , 1804 , 8vo . -Reports and proceedings & c . of the Delaware and Chesapeak canal company , 8vo . Hamilton ( William ) Samtliche Papierversuche ; nebst mustern und Kupfertafeln , von J. C. Schaffers ...
Страница 94
... acid of the oak . Means were then used to prevent its further action , by the interven- tion of putty and pasteboard ; and in most cases by substitut- ing pine timbers in the room of those of oak . CAST - IRON BOILER . Within the last ...
... acid of the oak . Means were then used to prevent its further action , by the interven- tion of putty and pasteboard ; and in most cases by substitut- ing pine timbers in the room of those of oak . CAST - IRON BOILER . Within the last ...
Страница 130
... acid ( though having used much water , the acid was of course weak , and nearly colourless ) I immediately dissolved copper in it , and found that it yielded as pure nitrous air as any that I had ever procured in the same way ...
... acid ( though having used much water , the acid was of course weak , and nearly colourless ) I immediately dissolved copper in it , and found that it yielded as pure nitrous air as any that I had ever procured in the same way ...
Страница 131
... acid from hail stones , I was instantly deter- mined to excite other persons to repeat the experiment as well as myself , having now more confidence in my own . What was the acid that Dr. Mitchell procured he did not ascertain , mine ...
... acid from hail stones , I was instantly deter- mined to excite other persons to repeat the experiment as well as myself , having now more confidence in my own . What was the acid that Dr. Mitchell procured he did not ascertain , mine ...
Страница 132
... acid , as mine always was , procured.— This , being formed , will , of course attach itself to any snow or hail that may be forming in the same region at the same time , and by this means be brought down to the earth ; con- firming , in ...
... acid , as mine always was , procured.— This , being formed , will , of course attach itself to any snow or hail that may be forming in the same region at the same time , and by this means be brought down to the earth ; con- firming , in ...
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Страница 30 - I was called up," says Mr. Ellicott, " about 3 o'clock in the morning, to see the shooting stars, as they are called. The phenomenon was grand and awful. The whole heavens appeared as if illuminated with sky-rockets, which disappeared only by the light of the sun, after daybreak. The meteors, which at any one instant of time appeared as numerous as the stars, flew in all possible directions except from the earth...
Страница 328 - The masses, projected at the second explosion, seem to have fallen principally at and in the vicinity of Mr. William Prince's in Weston, distant about five miles, in a southerly direction, from Mr. Burr's.
Страница 139 - Appearances certainly indicate that it has derived both origin and growth from the accustomary collection of hones, and deposition of them together ; that the first collection had been deposited on the common surface of the earth, a few stones put over it, and then a covering of earth, that the second had been laid on this, had covered more or less of it in proportion to the number of bones, and...
Страница 327 - It is therefore probable that the masses tell in this ordtr — the most northerly first, and the most southerly last. We think we are able to point out three principal places where stones have fallen, corresponding with the three loud cannon-like reports, and with the three leaps of the meteor, observed by Mr.
Страница xliv - Representatives, on the subject of establishing a uniformity in the weights, measures, and coins, of the United States, has proposed that the weight of the dollar should correspond with the unit of weight.
Страница 92 - ... from which no particular mode of application can be free. These are : " First. The weight of the engine and of the fuel. "Second. The large space it occupies. " Third. The tendency of its action to rack the vessel and render it leaky. " Fourth. The expense of maintenance " Fifth. The irregularity of its motion, and the motion of the water in the boiler and cistern, and of the fuelvessel in rough water. "Sixth. The difficulty arising from the liability of the paddles or oars to break, if light,...
Страница 93 - ... sixth, the difficulty arising from the liability of the paddles or oars to break if light, and from the weight, if made strong. Nor have I ever heard of an instance, verified by other testimony than that of the inventor, of a speedy and agreeable voyage having been performed in a steamboat of any construction.
Страница 92 - ... started into very general notice in a form in which it could not possibly be attended with much success. A sort of mania began to prevail, which indeed has not yet entirely subsided, for impelling boats by steam-engines. . . . For a short time a passage-boat, rowed by a steam-engine, was established between Bordentown and Philadelphia, but it was soon laid aside.