Proceedings of the Physical Society, Volumes 9-10Institute of Physics and the Physical Society., 1888 - Physics |
Contents
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Common terms and phrases
acid alternating currents amperes angle anode armature Avogadro's law Ayrton bismuth bubble calculated cell cent centim charge chemical chloride circuit Clark cell Classen coefficient coil condenser constant cooling copper curvature curve deflection deflexion determined diameter direction dynamo effect electrical resistance electrodes electrolyte electromotive force energy equal equation error experiments film formula galvanometer give given glass greater heat Hence hydrogen inches increase induction instrument insulated iron wire length light liquid load machine magnetic circuit magnetizing force means measure mercury metal method millim mirror molecular molecules needle nickel observed obtained ohms oscillator osmotic pressure paper permanent permeability placed plane plate platinum polarization position potential produced Prof quantity Read reversed ring rotation scale self-induction Society solution spark stress substance sulphate sulphuric sulphuric acid surface temperature tion torsion tube velocity volt wave wave-length zinc
Popular passages
Page 15 - I shall lose no time in repeating and extending these experiments, being satisfied that the grand agents of nature are, by the Creator's fiat, indestructible ; and that wherever mechanical force is expended, an exact equivalent of heat is always obtained.
Page 15 - Association in 1843, in a paper on " The Calorific Effects of Magneto-Electricity, and on the Mechanical Value of Heat.
Page 333 - But when subjected to the influence of an electrified body, as a nibbed stick of sealing-wax, brought near the point of resolution, the colliding drops no longer rebound but coalesce, and the entire stream of water, both ascending and descending, appears to become coherent. Now it seems to me certain that the innumerable minute particles of water generated in the steam-jet, each consisting perhaps of only a few molecules, must necessarily come into frequent collision with one another ; for we cannot...
Page 9 - President, in the Chair. THE following were elected Members of the Society :— Mr.
Page 87 - I was examining the condition of the wire in a darkened room, when a new and unexpected change revealed itself. During the cooling of the wire it was found that, just as it reached a very dull red heat, a sudden accession of temperature occurred, so that it glowed once more with a bright red heat. Illuminating the index and scale of the apparatus, which was watched by an assistant, it was at once found that the reheating of the wire occurred simultaneously with the momentary elongation.
Page 16 - Edinburgh, and began practical life in a mercantile office. In the course of a business voyage to Australia his particular taste for physical science developed itself, and his first published papers : " On the adaptation of the eye to different rays...
Page 30 - On the Calculation of the Coefficient of Mutual Induction of a Circle and a Coaxial Helix, and of the Electromagnetic Force between a Helical Current and a Uniform Coaxial Circular Cylindrical Current Sheet.
Page 442 - For the energy of the whole system we should have the double of this, and, if it were necessary to include them, terms proportional to a? and y* to represent the energy of the fixed pulleys.
Page 13 - ... small diameter and pitch was exhibited. By such a combination small rotations can be immensely magnified. The great features of the patent spring as a magnifier are the entire absence of friction and back lash, and the large range of proportionality. III. On a New Barometer, called " the Amphisbcena." By TH BLAKESLEY.* THIS instrument consists of a straight glass tube of uniform internal cross section, closed at one end and open to the atmosphere at the other. A thread of quicksilver occupies...
Page 386 - Brockie-Pell arc lamp, but if necessary a lime-light can be readily substituted. The lamp is fixed to the base-board, and the body can be rotated through 60° on either side of the central position, thus allowing any of the three nozzles to be directed towards the screen. The three sets of condensers are placed so that their axes intersect at a point about which the radiant is placed. The centre nozzle is fitted as a lantern microscope, with...