The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1920 - English periodicals |
Contents
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Common terms and phrases
æther anemometer atmosphere atomic axis B₁ bands beam brightness cadmium calculated carbon carbon bands cent coal-gas corresponding curve cylinder deflexion density determined diamagnetic diameter difference displacement effect electric field electron emission emitted energy equal equation error experimental experiments expression fluid fluorite formula frequency furnace gases give given graphite gravitational heating current helium hydrogen increase intensity ionization J. J. Thomson latent heat least common multiple light lines luminous magnetic field magnetic susceptibility mass means measured mercury method mixture molecules motion nitrogen observed obtained orbits oxygen paper particles Phil plane plate positive pressure radiation ratio red fringe rotation saturation shown solution specific heat spectra spectrum surface susceptibility temperature theory thermelectronic current tube vapour variation velocity visibility volts volume wave-length waves wire zero
Popular passages
Page 620 - Such coincidences cannot be detected on the same spectrum photographically; but if we first add and then subtract a small potential from one of the large potentials, two lines will be obtained which closely bracket the third. To take an actual instance...
Page 620 - VII, b), nor was it when the hydrogen molecule was bracketed by two helium lines (d). Both results show in an unmistakable manner that the mass of He is less than twice that of H2.
Page 98 - The coefficient of reflection or total reflecting power of a surface is defined as the ratio of the total reflected luminous flux to the total incident luminous flux. In most practical work this value is not of great importance, the value desired being that of the reflecting power of the surface measured under certain specified conditions, such as the angle of incidence of the flux and the position from which the surface is viewed. The term '* reflection factor...
Page 384 - ... form many geological phenomena, such a"s the structure of a volcano or the land-forms resulting from erosion, and may be of value in the teaching of the science. In the second place it may, in certain circumstances, become a valuable means of research, especially in...
Page 610 - C, 2-5 cm. wide, is concave, about 8 cm. radius of curvature, and is placed just in the neck of the bulb — this shape and position having been adopted after a short preliminary research.1 In order to protect the opposite 1 Aston, Proo.
Page 384 - In arid country, where the underlying rock is laid bare, the aeroplane camera often shows the general geological structure of the district. The lacustrine deposits of the Jordan Valley and their weathering was shown, and also the form of the drainage-channels running down into the main valley. The depression of the Dead Sea with reference to the surrounding country has resulted in canon formation in many places. Some evidences of faulting at different periods can be distinguished. The Jordan at present...
Page 621 - It will bo noted that one member of each group is obliterated by the reference line, but not the same one. The singly and doubly charged krypton clusters can be seen to the right and left of Spectrum VIII. It will be noticed that krypton is the first element, examined which shows unmistakable isotopes differing by one unit only.
Page 384 - ... running down into the main valley. " The depression of the Dead Sea with reference to the surrounding country has resulted in canon formation in many places. Some evidences of faulting at different periods can be distinguished. The Jordan at present forms an interesting study in river-development, and many of its main features were demonstrated. The relation of the Jordan to the Orontes has been considered, and an aeroplane photographic survey of the country between the two rivers indicates that...
Page 675 - THE object of this paper is to endeavour to supply a method of representing in terms of physical conceptions the processes occurring in physical phenomena. It is an attempt to help -those who like to supplement a purely analytical treatment of physical problems by one which enables them to visualize physical processes as the working of a model ; who like in short to reason by means of images as well as by symbols.
Page 621 - Krypton is characterized by a remarkable group of five strong lines at 80, 82, 83, 84, 86, and a faint sixth at 78. This cluster of isotopes is beautifully reproduced with the same relative values of intensity in the second, and fainter still in the third order. These multiply-charged clusters give most reliable values of mass, as the second order can be compared with A (40) and the third with CO or N2 (28) with the highest accuracy.