Philosophical MagazineTaylor & Francis., 1917 - Physics |
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Common terms and phrases
20 volumes absorption coefficients adiabatic adiabatic invariant æther apparatus approximately axis brightness calculated centre charge colour component constant coordinates corresponding critical speed curve deflexion density determined discrimination fraction distance double-layer electric electromotive forces electrons emission energy equal equation experimental experiments expression ferromagnetic field flicker photometer formula frequencies gases given glass H atoms hydrogen hypergeometrical series hysteresis increase intensity intrinsic potentials kinetic lines liquid magnetic means measured membrane mercury metals method mixed vapours mixture molecular molecules molybdenite motion observed obtained optical optical contact osmotic pressure paper parallel parameters partial pressure particles Phil photometer plane plate positive primary pure solvent radiation ratio rays refractivity rotation shown solution solvent spectrum string strip substance surface surface-tension Table temperature theory tube values vapour pressure velocity vibration volts wave-length xenotime zero zircon ᎡᎢ
Popular passages
Page 500 - that every part of this medium is connected with an atom of other matter by an attractive force varying as distance, and that there is also a force of resistance between the medium and the atoms varying as their relative velocity, the atoms being independent of each other"; and he shows that the equations of propagation in this compound medium are where p and...
Page 484 - ... the atomic absorption coefficient expresses the proportion of the energy of an X-ray pencil which is absorbed in crossing a surface on which lies one atom to every square centimetre.
Page 517 - ... 10. Conclusion The problems discussed in this paper show, as I hope, that the adiabatic hypothesis and the notion of adiabatic invariants are of importance for the extension of the theory of quanta to still more general classes of motions (§§ 6, 7) ; furthermore, that they throw some light on the question: What conditions are necessary that Boltzmann's relation between probability and entropy may remain valid (§ 8) ? Hence it would be of great interest to develop a systematic method of finding...
Page 273 - Vicing observed. Glass surfaces can be polished without difficulty so nearly flat — or so nearly of the same curvature — that, when carefully cleaned and freed from dust, they show less than one interference-fringe per inch when placed together and examined by light, reflected from the interfaces. Such surfaces can be pressed into optical contact by the application of pressure of several pounds per square inch, and the pieces of glass act as one for optical purposes : for example, if the hypotenuse...
Page 499 - Bort's conception of the great centres of action of atmospheric circulation will find an extensive application ; because, although at present it would be premature to try to explain why it is that some changes of phase may occur simultaneously in Arctic and Antarctic regions, or in North America and Siberia, it seems impossible to conceive such correlations without supposing some relationship with the exchange of pressure between the seasonal and permanent centres of action. New York City, November...
Page 204 - By sending the current in at the middle electrode and out at the corners one has an approximately radial current flowing at right angles to the magnetic field of the magnet, which plays the part of the positive nucleus in the experiment. This causes the mercury to rotate and carry the balls with it. The apparatus consists of a wooden tray, as shown in fig.
Page 386 - Of course a strict mathematical proof of their existence is a desideratum ; but I think that the reader, who follows the results of the calculations here put forward, is likely to be convinced that permanent waves of moderate height do exist^. La nostra ricerca risponde al desiderato di Lord Rayleigh...
Page 230 - K emission is present, but whether thehigh values by the balance method are caused by the presence of some heavy ion or are due to the motion of the strip is a matter of doubt. It is unfortunate that the initial emission beginning with 150° was too small and transient to measure. 5. Platinum Chloride. (a) This salt was made by dissolving some clean strips of platinum in aqua regia. The solution was evaporated to dryness and the residue dissolved in distilled water. The washing process was repeated...
Page 162 - ... represented by the sum of the squares of the integrals, is an even function. The field of view is thus symmetrical with respect to the axis. The integrals in (6) may be at once expressed in terms of the so-called sine-integral and cosine-integral defined by e.