The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1895 - English periodicals |
Contents
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Common terms and phrases
accuracy acid æther alternating current amperes aniline apparatus approximately bismuth bridge-wire calculated calorimeter candle carbon cell cent centim chemical chloride Clark cells coil compounds connexion constant containing cooling copper correction corresponding cube curve cylinder deflexion determined dielectric distance effect elastic electrical electromotive force emissivity energy equal equation error ethylene experiments force galvanometer gases give given glass grammes gravitation heat of fusion hydrochloric acid hydrogen increase induction iron Joule lamps liquefaction liquefied liquid oxygen lower magnetic manganin mass means measured melting-point mercury metals method millim molecular molecules motion observed obtained oscillation paper particles Phil plate platinum pressure produced Prof quantity ratio Regnault resistance solid specific heat spectrum substance surface Table taken theory thermometer tion tube values of M² vessel vibration volts volume watts wire zero
Popular passages
Page 169 - ... the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of...
Page 169 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Page 169 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Page 144 - That gravity should be innate, inherent and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of any thing else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking, can ever fall into it.
Page 98 - ... very nearly a swaying to and fro of it as a whole : if it were exactly this, it could not be expected to produce any breaking up of the molecule at all. Moreover, as at the antinodes of the vibration there is movement but no stress in the medium, so at the nodes there is stress but no movement ; and it does not seem at all clear that alternating stress might not be as potent a factor in disintegration as alternating motion. A representation has been constructed by Lord Kelvin...
Page 372 - Schnyder von Wartensee's Foundation, Zurich, for the solution of the following problems in the domain of physics. " As the numbers which represent the atomic heats of the elements still show very considerable divergences, the researches conducted by Professor HF Weber on boron, silex, and carbon, regarding the dependence of the specific heats upon the temperature, are to be extended to several other elements, prepared as pure as possible, and also to combinations or alloys of them. Further, the densities...
Page 99 - A theory based in this manner on difference of inertia must take the density of the aether to be very minute compared with that of matter ; therefore if the molecule is to have free periods of the same order of magnitude as the periods of the incident light-waves, the elastic forces acting between the atoms and concerned in these periods must be very intense. But Lord Kelvin's well-known estimate of the rigidity of the aether on this hypothesis makes it very small compared with the ordinary rigidity...
Page 98 - There are about 1U3 molecules of the sensitive medium in the length of a single wave of light : thus in the stationary wavetrain all the parts of a single molecule would at any instant be moving with a sensibly uniform velocity, which increases and diminishes periodically.
Page 154 - ... of the mundane atoms, very great density for their substance, and very small volume and mass, and very great velocity for the ultramundane corpuscules. The object of the present note is to remark that (even although we were to admit a gradual fading away of gravity, if slow enough), we are forbidden by the modern physical theory of the conservation of energy to assume inelasticity, or anything short of perfect elasticity, in the ultimate molecules...
Page 514 - ... those situated at the bottoms of valleys, consisting of stratified layers of waterworn sand, gravel, and large pebbles, occurring in such order as to show that the agents which produced them have greatly decreased in intensity. II. Agglomerates and breccias found along coast-lines and faultterraces, always at the foot of the fault-terraces, or along the lower slopes of the depressed areas : these accumulations are either submerged or lie at the water-line. Their materials are much waterworn,...