Proceedings of the Physical Society, Volumes 1-2Institute of Physics and the Physical Society., 1876 |
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Proceedings of the Physical Society, Volumes 1-2 Institute of Physics and the Physical Society Visualização completa - 1876 |
Proceedings of the Physical Society, Volumes 18-19 Institute of Physics and the Physical Society Visualização completa - 1904 |
Proceedings of the Physical Society, Volume 18 Institute of Physics and the Physical Society Visualização completa - 1902 |
Termos e frases comuns
acid angle anhydrous apparatus battery brine carbon cell cent centims centre chloride circle circuit circular condenser conductivity conductor constant cooled copper cord cryogen cryohydrate crystals cubic centimetre curves deflection diameter difference of potential disk distance effect electricity electrodes electrolyte electromotive force equal equipotential lines experiments flow-lines Fraunhofer lines freezing-mixture galvanometer given glass grms H₂O heat Hence hydrate hydrogen inch increased lead chloride length lines of flow liquid magnetic means measured mercury metals millimetres millims molecular molecules NaCl Nicol prism nitrate observed obtained paper passing placed plate platinum polarization poles position pressure prism produced Prof quantity ratio rays resistance saturated Separation of Ice sheet sink sodium solid solidifies solution spectrum Sprengel pump strength sulphate surface temperature tion troughs tube velocity vertical vibrations water of crystallization water-worth wave-length waves weight wire zinc πκδ
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Página 94 - This system, according to which resistance comes to be represented by the slope of a straight line (that is, by the tangent of the angle which the line makes with the axis of abscissae), was lately employed by M. Crova* for the discussion of experiments relating to the degree of constancy possessed by so-called
Página 4 - For nearly two years I have felt quite sure that the proper explanation of voltaic action in the common voltaic arrangement is very near Volta's, which fell into discredit because Volta or his followers neglected the principle of conservation of force.
Página 118 - Then, at the points where 1 and 1', 2 and 2', 3 and 3', 4 and 4' respectively intersect each other, the potentials will be the sums of the potentials of the intersecting lines; and therefore the potential at all these points is the same, namely V + V. Consequently P, Q, R, and S are points on the same equipotential line.
Página 237 - If the pressure be further increased, the sounds become weaker, tho very clear, and, as the pressure is still further augmented, the sounds die out (as if the speaker was talking and walking away at the same time) until a point is arrived at where there is complete silence.
Página 157 - ... Royal Society's Transactions) the power of augmenting the magnetism by successive currents, developed from the original residual magnetism contained in the iron, was fully demonstrated, and it was shown that the power of the machine could thereby be developed to a great extent ; but the only means for obtaining external work was by the insertion in the circuit of a magnet or coil so that the secondary discharge could be utilized.
Página 152 - ... observing- telescope, and is divided along a line at right angles to the refracting edge of the prism. One half of the lens is fixed ; the other half is made to slide over it by means of a micrometer-screw.
Página 66 - Colombo itself, at a distance of 45 miles) — may be distinctly seen through it ; so that the shadow is not really a shadow on the land, but a veil of darkness suspended between the observer and the low country. All this time it is rapidly rising and approaching, and each instant becoming more distinct, until suddenly it seems to fall back on the spectator, like a ladder that has been reared beyond the vertical ; and the next instant the appearance is gone.
Página 5 - Jenkin advocates essentially the same views: "When two dissimilar metals are plunged side by side into a liquid such as water or dilute sulphuric acid, they do not exhibit any sign of electrification ; the three materials remain at one potential, or nearly so. If while the two dissimilar metals are in the liquid they are joined by metallic contact to terminal pieces of one and the same metal, these terminal pieces will be brought to the same difference of potentials as that which would be produced...
Página 4 - Professor Jenkin, referring to these experiments of Thomson, adds, that " In cases where no known chemical action occurs, as where zinc and copper touch each other, and yet difference of potential is produced, since this involves a redistribution of electricity, a small but definite consumption of energy must then occur ; the source of this power cannot yet be said to be known."!
Página 10 - Joined up with a galvanometer it indicates a current, which, however, rapidly falls off in strength, owing to the formation of an insoluble cupric sulphide upon the copper plates. Joined up in opposition to a single Daniell's cell, with a galvanometer included in the circuit, I find that it requires from four to five cells to balance the force of the Daniell at first immersion ; but after leaving it to work on short circuit for 2J hours its electromotive force had fallen off 50 per cent.