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The analysis of crystals by the X-ray spectrometer
The Royal Society - Tập 89 Số 613 - Trang 468-489 - 1914
W. L. Bragg
In a former communication to the Royal Society, an attempt was made to determine for certain crystals the exact nature of the diffracting system which produces the Laue X-ray diffraction photographs. The crystals chosen for particular investigation were the isomorphous alkaline halides NaCl, KCl, KBr, and KI. As in the original experiments of Laue and his collaborators, a thin section of c...... hiện toàn bộ
On the free transverse vibrations of a uniform circular disc clamped at its centre; and on the effects of rotation
The Royal Society - Tập 101 Số 709 - Trang 133-153 - 1922
Richard Southwell
1. A thin circular disc, entirely unconstrained, can vibrate transversely in modes which may be characterized by any number of nodal concentric circles, crossed by uniformly spaced nodal diameters. The natural frequencies, for a disc of uniform thickness, have been calculated by Kirchhoff, and a recent investigation by Prof. Lamb and the present author has shown the amount by which they ar...... hiện toàn bộ
The vibrations of a spinning disk
The Royal Society - Tập 99 Số 699 - Trang 272-280 - 1921
Horace Lamb, Richard Southwell
1. This paper treats of the transverse vibrations of a circular disk of uniform thickness rotating about its axis with constant angular velocity. The problem has a practical bearing, as throwing light on the occasional failure of turbine disks. In an impulse turbine blades are fitted to the rim of a thin disk, and steam is admitted to them from nozzles which are usually arranged symmetrica...... hiện toàn bộ
The viscosity of a fluid containing small drops of another fluid
The Royal Society - Tập 138 Số 834 - Trang 41-48 - 1932
Geoffrey Ingram Taylor
The viscosity of a fluid in which small solid spheres are suspended has been studied by Einstein as a problem in theoretical hydrodynamics. Einstein’s paper gave rise to many experimental researches on the viscosity of fluids containing solid particles, and it soon became clear that though complete agreement with the theory might be expected when the particles are true sphered, some modifi...... hiện toàn bộ
A contribution to the mathematical theory of epidemics
The Royal Society - Tập 115 Số 772 - Trang 700-721 - 1927
W. O. Kermack, A. G. McKendrick
(1) One of the most striking features in the study of epidemics is the difficulty of finding a causal factor which appears to be adequate to account for the magnitude of the frequent epidemics of disease which visit almost every population. It was with a view to obtaining more insight regarding the effects of the various factors which govern the spread of contagious epidemics that the pres...... hiện toàn bộ
The thermal conductivity of vitreous silica, with a note on crystalline quartz
The Royal Society - Tập 113 Số 764 - Trang 335-351 - 1926
G. W. C. Kaye, W. F. Higgins
Vitreous silica is a material which finds extended application in many branches of scientific work, and considerable attention has been given to some of its physical constants. Little work has, however, been done on the thermal conductivity. Eucken and Barratt appear to be the only workers who have attacked the problem, their results being by no means in agreement, as is shown...... hiện toàn bộ
Optical rotatory power. I—A theoretical calculation for a molecule containing only isotropic refractive centres
The Royal Society - Tập 144 Số 853 - Trang 655-675 - 1934
Samuel Francis Boys
Ever since the time of van’t Hoff and Le Bel the number investigations dependent on optical activity, or attempting to elucidate optical activity, has been very great, and it is remarkable that, even at the present time, there is no theoretical formula which gives the relation between the magnitude of the rotation and the chemical structure of the molecule concerned. The present communicat...... hiện toàn bộ
Optical rotatory power. II.—The calculation of the rotatory power of a molecule containing four refractive radicals at the corners of an irregular tetrahedron
The Royal Society - Tập 144 Số 853 - Trang 675-692 - 1934
Samuel Francis Boys
It has been shown in the previous paper that, where there are four refractive centres arranged dissymmetrically in a molecule, there is a definite rotatory power depending on the dimensions of the molecule. In the simple active molecule of four different radicals we seem to have been provided directly with four different refractive centres. It is, however, necessary to examine if a chemica...... hiện toàn bộ
The thermodynamics of adsorption at the surface of solutions
The Royal Society - Tập 139 Số 837 - Trang 218-236 - 1933
E. A. Guggenheim, Neil Kensington Adam
In Gibbs’ thermodynamic theory of surfaces, the general equations governing equilibrium at interfaces were given, including equations governing adsorption. He pointed out, that in order to assign definite numerical values to the surface excess Г of each component, it is necessary to choose a definite position for a certain mathematical surface, placed parallel to, and within, or near to, t...... hiện toàn bộ
On the dynamical theory of gratings
The Royal Society - Tập 79 Số 532 - Trang 399-416 - 1907
John William Strutt
In the usual theory of gratings, upon the lines laid down by Fresnel, the various parts of the primary wave-front after undergoing influences, whether affecting the phase or the amplitude, are conceived to pursue their course as if they still formed the fronts of waves of large area. This supposition, justifiable as an approximation when the grating interval is large, tends to...... hiện toàn bộ
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