Notices of the Proceedings, Том 13

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Стр. 460 - B are equal and opposite, the axes of the pendant pulleys and the attached weights remain at rest. In the electrical analogue the rotatory velocity of A corresponds to a current in a primary circuit, that of B to a current in a secondary. If, when all is at rest, the rotation of A be suddenly started, by force applied at the handle or otherwise, the inertia of the masses E, F opposes their sudden movement, and the consequence is that the pulley B turns backwards, ie in the opposite direction to the...
Стр. 341 - I went into the cube and lived in it, and using lighted candles, electrometers, and all other tests of electrical states, I could not find the least influence upon them, or indication of anything particular given by them, though all the time the outside of the cube was powerfully charged, and large sparks and brushes were darting off from every part of its outer surface.
Стр. 367 - We can thus find the relations of temperature to pressure for certain definite volumes, which we may select to suit our convenience- — say, 2 cc per gram ; 3, 4, 5, 6, and so on. Now, all such lines are straight — that is, the relation of pressure to temperature, at constant volume, is one of the simplest ; pressure is a linear function of temperature. Expressed mathematically — where b and a are constants, depending on the volume chosen, and varying with each volume.
Стр. 5 - I was very anxious that he should devote his life to science, and persuaded him to become a candidate for the Professorship of Natural Philosophy at St Andrews. He was on the point of securing this, but his personal slight deformity ! was an objection in the eyes of one of the electors, and St Andrews lost the glory of having one of the greatest discoverers of our age.
Стр. 693 - Whenever the circuit was completed the liquid oxygen rose from the cup and connected the two poles, as represented in the cut, which is copied from a photograph of the phenomenon. Then it boiled away, sometimes more on one pole than the other, and when the circuit was broken it fell off the pole in drops back into the cup. He also showed that the magnet would draw up liquid oxygen out of a tube.- A test-tube containing liquid oxygen, Air In air.
Стр. 460 - Faraday did not light upon truth without delay and difficulty. One of Faraday's biographers thus wrote: — " In December 1824, he had attempted to obtain an electric current by means of a magnet, and on three occasions he had made elaborate and unsuccessful attempts to produce a current in one wire by means of a current in another wire, or by a magnet. He still persevered, and on August 29, 1831...
Стр. 669 - ... flame shows in its visible part, on a background of a continuous spectrum, a large number of bands, brightest in the green, but extending on the red side beyond the red line of lithium, and on the violet side well into the blue. These bands cannot be seen on the photograph which I will now show you, the visible part of the spectrum appearing continuous ; but beyond the visible part the photograph shows a large number — over fifty— of well-defined lines in the ultra-violet.
Стр. 365 - For example, you see that the meeting points of his hyperbolic curves with the straight lines of vapor pressures are curves, and not angles; that is caused by the presence of about 1 part of air in 500 parts of carbon dioxide; also the condensation of gas was not perfect, for he obtained curves at the points of change from a mixture of liquid and gas to liquid. We however were more easily able to fill a tube with ether free from air, and you will notice that the points I have referred to are angles,...
Стр. 143 - ... changes due entirely to the peculiar character of the silver salts. The material composing the image is not of that definite nature with which modern chemical methods are in the habit of dealing. The stability of the photosalt is determined by some kind of combination between the sub-haloid or oxy-haloid, or whatever it may be, and the excess of unaltered haloid which enters into its composition. The formation of the coloured product presents certain analogies with the formation of a saturated...
Стр. 348 - Mr. Willoughby Smith's experiments on " Volta-electric induction," which he described in his inaugural address to the Society of Telegraph Engineers of November 1883, afforded good illustration of this kind of action with copper, zinc, tin, and lead, screens, and with different degrees of frequency of alternation. His results with iron are also very interesting : they showed, as might be expected, comparatively little augmentation of screening effect with augmentation of frequency.

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