A Synopsis of Practical Philosophy: Alphabetically Arranged, Containing a Great Variety of Theorems, Formulae, and Tables

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John Weale, 1843 - Physics - 390 pages

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Page 260 - That there is no notable difference in sea-water under different meridians. 4. That there is no satisfactory evidence that the sea at great depths is more salt than at the surface. 5. That the sea, in general, contains more salt where it is deepest and most remote from land ; and that its saltness is always diminished in the vicinity of large masses of ice. 6. That small inland seas, though communicating with the ocean, are much less salt than the ocean.
Page 151 - ... 3 per cent. ? 4 per cent. ? 5 per cent. ? 6 per cent. ? 7 per cent. ? 7 per cent. ? 8 per cent.?
Page 8 - The strength of men, and of all animals, is most powerful when directed against a resistance that is at rest; when the resistance is overcome, and when the animal is in motion, its force is diminished; lastly, with a certain velocity, the animal can do no work, and can only keep up the motion ot its own body.
Page 70 - Christ, and divide the sum by 28, the quotient is the number of cycles elapsed since his birth, and the remainder is the cycle for the given year: if nothing remains, the cycle is 28. To find the lunar cycle, add one to the given year...
Page 38 - If a be the length of the arm of the balance, and b the distance between the centre of suspension and the centre of gravity, P the load in either scale, and W the weight of the beam, the sensibility of the balance is as...
Page 108 - When a floating body, for instance the hull of a vessel, is in equilibrium, the centre of buoyancy lies in the same vertical line with the centre of gravity of the body.
Page 248 - ... in a given time. Observe a place where the banks of the river are steep and nearly parallel, so as to make a kind of trough for the water to run through, and by taking the depth at various places in crossing make a true section of the river. Stretch a string at right...
Page 228 - Having given the radius of an arc of any colour in the secondary rainbow, find the ratio of the sine of incidence to the sine of refraction when rays of that colour pass out of air into water.
Page 8 - ... the three properties just mentioned, will afford an approximation to the law of animal force. Let P be the weight which the animal exerting itself to the utmost, or at a dead pull.- is just able to overcome ; W any other weight with which it is actually loaded ; and...
Page 217 - The radius of projection of any other great circle is the secant of the angle between the plane of the circle -and the plane of projection. From these Arts, it appears, that the projection of the parts of the sphere will not properly represent, in magnitude and situation, the parts themselves.

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