The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1907 - Physics |
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Common terms and phrases
absorbed absorption actinium æther albedo aluminium amount amperes angle approximately atomic weight axis calculated capillary layer carbon cathode cent circuit coefficient coil condenser constant copper corpuscles corresponding cosh curve cylinder decrease deflexion distance earth effect electric electrometer electrons electroscope emanation energy equal equation experiments field force formula frequency galvanometer gases given gives gram heat Hence hydrogen increase induction intensity ionization ions iron J. J. Thomson lead leak length light lines liquid Lord Rayleigh magnetization maximum measured metal method millimetres molecular molecules motion negative nickel observed obtained oscillations particle Phil plane plate polarization positive potential pressure primary produced proportional quantity radium ratio rotation screen secondary radiation secondary rays shown sinh solution substance surface temperature tension theory thickness tube twist uranium vapour velocity vibrations viscosity volts wave-length wire ән
Popular passages
Page 411 - connected to one pair of quadrants of an electrometer, the other pair of which was permanently connected to earth. The vessel A was 6'4 cms. long and 5 cms. in diameter, and its end was closed by an
Page 517 - "The abrupt commencement and the permanent stability of the black film demonstrate a proposition of fundamental importance in the molecular theory :—The tension of the film, which is sensibly constant when the thickness exceeds fifty micro-millimetres, diminishes to a minimum, and begins to increase again when the thickness is diminished to ten micromillimetres. It
Page 171 - may now find the depletion in the visible part of the spectrum which is not in general the same as that for the invisible part, decreasing relatively with the altitude and reversely increasing as the air envelope becomes thicker. It does this at a greater rate than the increase of the
Page 180 - is the albedo of its air. Taking the density of the air as proportionate to its brilliancy, which would seem to be something like the fact, since the denser the air the more dust it would buoy up, we have for the Martian air a density about
Page 169 - by Violle, Crova, Hansky, and others to the determination of this quantity at given places, and so to a conclusion as to the amount of heat outside our air, or the Solar Constant. Langley's great contribution to the subject was the pointing out that the several wave-lengths of the different rays were not of homogeneous action or modification, and that
Page 170 - of the whole. Loss of Heat in traverse of the Air. — Turning now from the question of the initial heat for different parts of the spectrum at the time the solar radiation enters the air, we come next to consider the loss the several
Page 174 - of, water, as investigation shows (see later in the paper) to something like 110° F. The sublimation at lower temperatures would be correspondingly increased. Consequently the amount of water-vapour in the Martian air must on that score be relatively greater than
Page 174 - received by the planet's surface. So that such a supposition would actually increase the cogency of the present argument. But the very thinness of the air joined to the lesser gravity at the surface of the planet would lower the boiling-point of, water,
Page 324 - indeed almost absolutely certain that there are many different kinds of atom, each eternally invariable in its own specific quality; and that different substances, such as gold, silver, lead, iron, copper, oxygen, nitrogen, hydrogen, consist each of them of atoms of one invariable quality; and that
Page 172 - transmission at the sea-level on the same principles as those for outside the atmosphere at Camp Whitney and at Lone Pine, and then measuring the amounts of transmission of each within the limits of the visual rays, from X