Philosophical MagazineTaylor & Francis., 1890 |
Contents
| 17 | |
| 22 | |
| 30 | |
| 48 | |
| 59 | |
| 88 | |
| 102 | |
| 124 | |
| 260 | |
| 282 | |
| 318 | |
| 363 | |
| 379 | |
| 386 | |
| 400 | |
| 423 | |
| 140 | |
| 146 | |
| 148 | |
| 160 | |
| 170 | |
| 190 | |
| 201 | |
| 223 | |
| 244 | |
| 431 | |
| 434 | |
| 440 | |
| 456 | |
| 476 | |
| 483 | |
| 494 | |
| 506 | |
Other editions - View all
Common terms and phrases
acid æther angle astatic atomic weights atoms axis bolometer brass cadmium cent centim circuit coefficient coil column constant corresponding curve deflexion density determined Devonian diameter direction discharge distance effect electric electrified electrodes electromotive force energy equal equation error experiments fibre formula fused quartz galvanometer give given glass heat hydrochloric acid hydrogen hysteresis inch increase induction instrument length light lines liquid Lord Rayleigh magnetic force mean measured metal method millim millimetres mirror molecular molecular magnets molecules motion needle negative observations obtained ordinary oscillations paper Phil piezometer plane plate position potential pressure produced Prof proportional quantity quartz refraction resistance rotation scale self-induction sodium sodium sulphate spark spectra spectrum striæ sulphate surface Table temperature theory thickness thread tion torsional tube velocity vibration wave wave-lengths weight Westleton wire zinc
Popular passages
Page 30 - Two similar pulleys, A, B, turn upon a piece of round steel fixed horizontally •)•. Over these is hung an endless cord, and the two bights carry similar pendent pulleys, C, D, from which again hang weights, E, F. The weight of the cord being negligible, the system is devoid of potential energy ; that is, it will balance, whatever may be the vertical distance between C and...
Page 245 - Resuming, then, what we have" said, we repeat that nature produces this cheapest light at about one-four-hundredth part of the cost of the energy which is expended in the candle flame, and at but an insignificant fraction of the cost of the electric light or the most economic light which has yet been devised, and that, finally, there seems to be no reason why we are forbidden to hope that we...
Page 442 - I am aware hitherto unnoticed, that according to this hypothesis Neumann's triangle is necessarily imaginary, that one of three fluids will always spread upon the interface of the other two. Another point of importance may be easily illustrated by this theory, viz. the dependency of capillarity upon abruptness of transition. " The reason why the capillary force should disappear when the transition between two liquids is sufficiently gradual will now be evident. Suppose that the transition from 0...
Page 32 - ... to a simply closed circuit. The equations which express the mechanical properties of the system are readily found, and are precisely the same as those applicable in the electrical problem. Since the potential energy vanishes, everything turns upon the expression for the kinetic energy. If...
Page 151 - ... centimetres below, gave, when metallically connected to the quadrants of an electrometer, deviations from the metallic zero in the same direction, and of nearly the same amount, as if cold water had been in place of the flame. This proved that flame acted as an electrolytic conductor. They also found that hot air from a large red-hot soldering bolt, put in the place of the...
Page 247 - The total radiation from one centimeter, then, would have caused a deflection of -j = 270400 div. The temperature of the bolometer, which was that of the apartment, was 20° C. According to Dulong and Petit's law, the radiation from such a surface at 99° C. to one at 20° C. would be I'll cal. per minute (e), which does not greatly differ from our own independent •In. determinations, and for 10*"' = 0'167 (/) (the time of the galvanometer swing) it equals Ó1Í85 (1>/).
Page 262 - Young's (1821) assertion that 'the existence of such a cohesive tension proves that the mean sphere of action of the repulsive force is more extended than that of the cohesive: a conclusion which, though contrary to the tendency of some other modes of viewing the subject, shows the absolute insufficiency of all theories built upon the examination of one kind of corpuscular force alone'.
Page 31 - In the electrical analogy 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 rotation imposed upon A.
Page 442 - ... being large compared to the range of the molecular forces, but small in comparison with the radius of curvature. At each step the difference of capillary pressure is only one quarter of that due to the sudden transition from 0 to a-, and thus altogether half the effect is lost by the interposition of the layer.
Page 452 - Never once have I seen it alluded to ; and it is, I believe, generally supposed that the first attempt of the kind is not more than twenty years