An Introduction to Natural Philosophy: Designed as a Text Book, for the Use of the Students in Yale College ... Compiled from Various Authorities, Volume 2

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Hezekiah Howe, 1832
 

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Page 40 - ... is equal to the weight of a column of water whose base is the section of the piston, and whose height is the distance of the level of the water in the barrel AC, above the level in the reservoir.
Page 83 - The first seven letters of the alphabet, A, B, C, D, E, F, G, are...
Page 90 - Nothing was ever written upon the subject of electricity, which was more generally read and admired in all parts of Europe than these Letters. There is hardly any European language into which they have not been translated; and, as if this were not sufficient to make them properly known, a translation of them has lately been made into Latin.
Page 200 - That the best mode of communicating magnetism to a needle appears to be placing it in the magnetic meridian, joining the opposite poles of a pair of bar magnets, (the magnets being in the same line,) and laying the magnets so joined flat upon the needle, with their poles upon its centre ; then, having elevated the distant extremities of the magnets, so that they may form an angle of about two or three degrees with the needle, they...
Page 278 - ... whence it follows, that the different thicknesses of the fluids at the places where the rings appeared, were nearly as 3 to 4 ; that is, in the ratio of the sine of incidence to the sine of refraction (Art. 749,) when the light passes from water into air.
Page 90 - It is not easy to say, whether we are most pleased with the simplicity and perspicuity with which these letters are written, the modesty with which the author proposes every hypothesis of his own, or the noble frankness with which he relates his mistakes, when they were corrected by subsequent experiments.
Page 200 - That the best mode of tempering a compass needle, is first to harden it at a red heat, and then to soften it from the middle to about an inch from each extremity, by exposing it to a heat sufficient to cause the blue colour which arises again to disappear.
Page 117 - he felt himself struck in his arms, shoulders, and breast, so that he lost his breath, and was two days before he recovered from the effects of the blow and the terror." He declared, that " he would not take a second shock for the whole kingdom of France.
Page 266 - By absorbing the excess of any colour at any point of the spectrum, above what is necessary to form white light, we may actually cause white light to appear at that point, and this white light will possess the remarkable property of remaining white after any number of refractions, and of being decomposable only by absorption.
Page 202 - ... gradually weaker ; and this deterioration is most accelerated when its poles have a position the reverse of the natural one. Under these circumstances, indeed, unless the magnet be made of the hardest steel, it will in no long time lose the whole of its magnetic power. Two magnets may also very much weaken each other if they be kept, even for a short time, with their similar poles fronting each other. The polarity of the weaker magnet, especially, is rapidly impaired, and sometimes is found to...

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