Proceedings of the Royal Society. Section A, Mathematical and Physical Science, Volume 86Harrison and Son, 1912 |
Contents
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Common terms and phrases
absorption active nitrogen angle apparatus appear approximately atmospheric atomic weight B-rays bands boron bright bromide calculated carbon cathode cent chemical chloride coefficient constant cubic centimetre curve cyanogen cymene density determined diameter disc distance effect electric electrodes equation experimental experiments film formula furnace gases George Johnstone Stoney given glow heat Huggins hydrogen inch intensity investigation ionisation ions iridium J. J. Thomson length light lines liquid luminosity magnetic maximum mean measured mercury method mgrm molecules nebula nitrogen observed obtained paper Phil photographs plate platinum position pressure Proc Prof radium ratio rays reflection Royal Dublin Society Royal Society scattered radiation selenium shear shear stress shown shows silica solution specimen spectra spectroscope spectrum stars Stoney stress surface Table temperature tension thickness tube vacuum tube van't vapour velocity voltage wave-lengths wire xenon y-rays
Popular passages
Page viii - ... 1. All the brighter stars, at least, have a structure analogous to that of the sun. 2. The stars contain material elements common to the sun and earth. 3. The colours of the stars have their origin in the chemical constitution of the atmospheres which surround them. 4. The changes in brightness of some of the variable stars are attended with changes in the lines of absorption of their spectra. 5. The phenomena of the star in Corona appear to show that in this object, at least, great physical...
Page vii - When the spectroscope was placed on the telescope, the light of this new star formed a spectrum unlike that of any celestial body which we have hitherto examined. The light of the star is compound, and has emanated from two different sources. Each light forms its own spectrum. In the instrument these spectra appear superposed. The principal spectrum is analogous to that of the sun, and is evidently formed by the light of an incandescent solid or liquid photosphere, which has suffered absorption by...
Page 612 - TJI necessarily exceeds the sum of the other two interfacial tensions. We are thus led to the important conclusion, so far as 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.
Page x - Even when spectroscope c, containing four compound prisms, and a magnifying power of 16 diameters, are used, the amount of the change of refrangibility to be observed appears very small. The probable error of these estimations is therefore large, as a shift corresponding to five miles per second (about jis of the distance of D1 to D"), or even a somewhat greater velocity, could not be certainly observed.
Page 619 - ... scarcely exceeds at all the diameter to be attributed to a molecule of oil. It is obvious therefore that the present phenomena lie entirely outside the scope of a theory such as Laplace's, in which matter is regarded as continuous, and that an explanation requires a direct consideration of molecules. If we begin by supposing the number of molecules of oil upon a water surface to be small enough, not only will every molecule be able to approach the water as closely as it desires, but any repulsion...
Page 604 - TK, as we see by considering the introduction (through a fine tube) of one body into the interior of the other. A comparison with another method of generating the interface, similar to that previously employed when but one body was in question, will now allow us to evaluate Tn.
Page 634 - If the stray field of a molecule, that is of a complex of these atomic systems, be unsymmetrical, the surface layer of fluids and solids, which are close-packed states of matter, must differ from the interior mass in the orientation of the axes of the fields with respect to the normal to the surface, and so form a skin on the surface of a pure substance having all the molecules oriented in the same way instead of purely in random ways.
Page viii - ... something of the motions of the stars relatively to our system. If the stars were moving towards or from the earth, their motion, compounded with the earth's motion, would alter to an observer on the earth the refrangibility of the light emitted by them, and consequently the lines of terrestrial substances would no longer coincide in position in the spectrum with the dark lines produced by the absorption of the vapours of the same substances existing in the stars.
Page 604 - This having been effected, let us now suppose that each of the units of area of free surface of fluid (1) is allowed to approach normally a unit area of (2) until contact is established. In this process work is gained which we may denote by 4T'u, 2T'u for each pair.
Page 634 - The corpuscular theory of matter traces all material forces to the attraction or repulsion of foci of strain of two opposite types. All systems of these foci which have been considered would possess an unsymmetrical stray field — equipotential surfaces would not be disposed about the system in concentric shells. If the stray field of a molecule, that is, of a complex of these atomic systems, be unsymmetrical, the surface layer of fluids and solids, which are close-packed states of matter, must...