Philosophical MagazineTaylor & Francis., 1890 - Physics |
Contents
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Common terms and phrases
æther apparatus atomic weights atoms axis boiling-point bolometer bulb calculated carbonic carbonic acid cent centim centimetres charge chemical circle of latitude coil colours conductivity constant corresponding curve deflexion density determined diameter direction dissociation distance effect electric electrodes electrolyte electromotive force elements equation experiments fog-bow galvanometer gases given glass greater heat hydrochloric acid hydrogen increase insulated iron J. J. Thomson liquid litres lunar magnetizing force maximum mean measurements mercury metal method millim millimetre molecular molecules motion nearly nickel normal observed obtained particles Phil plane plate platinum position pressure produced Prof quantity radiation radius resistance rotation schists SnCl4 solution solvent spectrum spheres stannic chloride steel substances sulphuric acid surface Table temperature theory tion transient current tube twist vapour velocity vibrations viscosity wave wave-lengths wire zinc
Popular passages
Page 154 - N2 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 suppose that they all travel with equal velocities and in exactly the same direction ; and there is no reason why they should not behave just in the same manner...
Page 27 - Though the surface of the full moon exposed to us, must necessarily be very much heated, — possibly to a degree much exceeding that of boiling water...
Page 272 - On the Relation of the Westleton Beds or Pebbly Sands of Suffolk, to those of Norfolk, and on their extension inland, with some observations on the Period of the Final Elevation and Denudation of the Weald and of the Thames Valley.
Page 168 - We*' , ......... (10) d?W the ordinary equation of sound in a uniform medium. Waves of the kind contemplated are therefore propagated without change of type except for the effect of the exponential factor in (10), indicating the increase of motion as the waves pass upwards. This increase is necessary in order that the same amount of energy may be conveyed in spite of the growing attenuation of the medium. In fact M>2<7 must retain its value, as the waves pass on.
Page 134 - Still it was soft, and by tempering would doubtless have doubled this value. If forged nickel and tungsten can be made to maintain a specific magnetism of 10, it will form a useful addition to the resources of physical laboratories. From the high polish of which it is susceptible and its freedom from damaging atmospheric influences, it will be most happily suited for the manufacture of mirror magnets where magnetic damping is to be employed.
Page 49 - That the mean temperature of the sunlit lunar soil is much lower than has been supposed, and is most probably not greatly above zero Centigrade.
Page 166 - ... to solve any problems that may present themselves, even though the search for simplicity may lead us to stray rather far from the actual question. It is proposed here to consider the case of an atmosphere composed of gas which obeys Boyle's law, viz. such that the pressure is always proportional to the density. And in the first instance we shall neglect the curvature and rotation of the earth, supposing that the strata of equal density are parallel planes perpendicular to the direction in which...
Page 171 - The relative magnitude of the latter [semidiurnal variation], as observed at most parts of the earth's surface, is still a mystery, all the attempted explanations being illusory.