Proceedings of the Royal Society of London: Containing papers of a mathematical and physical character. Series A, Volume 85Harrison and Son, 1911 - Electronic journals Publishes research papers in the mathematical and physical sciences. Continued by: Proceedings. Mathematical and physical sciences; and, Proceedings. Mathematical, physical, and engineering sciences. |
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Common terms and phrases
absorption acid actinium afterglow aluminium anticathode apparatus ARCHIBALD GEIKIE atoms B-rays bands bounded variation calculated carbon disulphide cathode rays cementite cent centimetre chemical coefficient colour Communicated by Prof condenser constant corpuscular corresponding curve cylinder density determined diameter discharge effect electric electrodes electroscope energy equation exit pupil experimental experiments Fourier series function given gives heat hydrogen hypsometer increase integral ionisation ions J. J. Thomson lines magnetic means measured mercury metal method molecules nitrogen observed obtained oxygen ozoniser paper pendulum Phil picric acid pipe plane plate platinum positive column potential pressure produced quantity radium radius ratio resistance Röntgen secondary shown silica solid solution spectra spectrum substance sulphide sulphur summable surface Table temperature theorem tube U-tube vacuum tube values vapour variation velocity vessel W. H. Young wave-lengths wire X-rays y-rays
Popular passages
Page 539 - Theoretically the power dissipated in 'iron losses' is proportional to the square of the current, and inversely proportional to the length of the magnetic path.
Page 43 - Rontgen radiation round a radiator has been measured. The intensity of the scattered radiation reaches a maximum on both sides of the radiator in the line of the primary beam, and falls to a minimum at right angles to this direction. At any given inclination to the primary beam there is a preponderance of radiation in the forward direction, the ratio increasing as the direction of the- primary beam is approached. The energy of the radiation scattered in a given direction has been compared with that...
Page 600 - Mallock*, who brings to bear the instinct and experience of a naturalist as well as of a physicist. His observations were mainly on the feathers of birds and the scales of insects, and they lead him to regard interference rather than selective reflexion as the origin of the iridescent colours. " The transparency or, at any rate, the vanishing of the characteristic transmitted colour in the case of all animal tissues when immersed and permeated by a fluid of the same refractive index is strongly in...
Page 246 - A, 85, 248-256 (1911) 4 The Association of Lead with Uranium in Rock-Minerals, and its Application to the Measurement of Geological Time. By ARTHUR HOLMES, ARCS, B.Sc., Imperial College of Science and Technology. (Communicated by Prof, the Hon. RJ Strutt, FRS Received March 20,— Read April 6, 1911.) 1. Introduction. — The study of radioactive minerals is of great importance from two points of view. Such minerals may be regarded as. storehouses for the various series of genetically connected radioactive...
Page xii - Arnheim's Land — can leave no room for further doubt. The erection of an overland telegraph line to the north coast should be regarded as a national work, in the carrying out of which all the Colonies should unite. In considering the question of route, we should not so much concern ourselves as to which Colony will derive the greatest benefit, according as it is started from this or that point, but be prepared to discuss the matter without local bias, and select that route which will traverse,...
Page 273 - As no atmosphere is free from dust, and that of cities is particularly dusty, these mineral constituents must be regarded as possible reagents in cases where there is evidence that very minute quantities of basic substances can initiate chemical reactions and isodynamic changes, such as have generally been considered as spontaneous, and in all cases where a solution in contact with air is liable to be affected.
Page 578 - ... discharge passed in the ozonizer in the ordinary way. The stopcocks both on the ozonizer and the charcoal were then closed, the electroscope charged, and the liquid air removed to allow the deposit to transform as usual. If only a feeble flash from a small short-time deposit was obtained, no effect was observed on the electroscope. If, however, a good bright flash was produced, then the leaves of the electroscope fell together a distance of not more than 2 mm., even with the most intense flash....
Page 580 - CS requires 8 = 72 • 7 per cent. Further, the ratio C : S was determined in another specimen collected from a number of experiments in which the condenser had been cracked and shattered. This specimen was probably contaminated with minute fragments of glass and also contained moisture. The material gave on analysis : — S = 61-0 per cent., C = 24'6 per cent., and ratio C :S = 1 : 0'854, or, allowing for the 5 per cent.
Page 579 - U-tube in liquid air, but later the deposit became coloured, and in 20 minutes a distinct brown ring was observed at a point 3 mm. above the liquid air surface. Where the gases entered the first limb of the U-tube at — 120° C. a white crystalline deposit was observed ; this did not melt until the temperature had risen almost to 0° C., when it distilled back into the bulb containing carbon disulphide. This indicates that the ozoniser product contains two substances, and shows that the substance...