Cataphoresis. Part II.—A new experimental method, and a confirmation of Smoluchowski’s equationThe Royal Society - Tập 133 Số 821 - Trang 130-140 - 1931
Chloe Sumner, D. C. Henry
In Part I of this communication it was shown that, subject to certain restrictions, the cataphoretic velocity of an insulating cylinder placed broadside on to the applied field should conform to Smoluchowski’s equation U = DXζ/4π
η
, (1) whereas the assumptions made by Hückel* lead to the result U = DXζ/8π
... hiện toàn bộ
On the free transverse vibrations of a uniform circular disc clamped at its centre; and on the effects of rotationThe 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 diskThe 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
On the theory of quantum mechanicsThe Royal Society - Tập 112 Số 762 - Trang 661-677 - 1926
P. A. M. Dirac
The new mechanics of the atom introduced by Heisenberg may be based on the assumption that the variables that describe a dynamical system do not obey the commutative law of multiplication, but satisfy instead certain quantum conditions. One can build up a theory without knowing anything about the dynamical variables except the algebraic laws that they are subject to, and can s...... hiện toàn bộ
The analysis of crystals by the X-ray spectrometerThe 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
The magneto-caloric effect and other magnetic phenomena in ironThe Royal Society - Tập 146 Số 857 - Trang 362-387 - 1934
Harold H. Potter
According to the Weiss theory a ferromagnetic body is composed of a number of “domains” each magnetized even in the absence of an external field to an intensity dependent on the temperature. At absolute zero this spontaneous magnetization (σ
0
) is equal to the saturation intensity (σ
∞
)...... hiện toàn bộ
On the direction of motion of an electron ejected from an atom by ultra-violet lightThe Royal Society - Tập 84 Số 568 - Trang 92-99 - 1910
Richard Kleeman
When light is absorbed by matter it exerts, according to the electro magnetic theory of light, a pressure upon the matter, or gives a momentum to it, in the direction of propagation of the light. The existence of this pressure has been proved by a number of observers. When ultra-violet light is absorbed by matter we know that a part at least of the absorbed energy is expended...... hiện toàn bộ
The production of single crystals of aluminium and their tensile propertiesThe Royal Society - Tập 100 Số 704 - Trang 329-353 - 1921
H. C. H. Carpenter, C. F. Elam
The crystals of which metals and alloys are composed are allotriomorphic. They are generally very small, and cannot usually be distinguished without the aid of a microscope. It is quite true that in the case of large castings weighing many tons, crystals of several cubic inches’ capacity may be formed under special conditions of cooling. These, however, are quite rare, and pos...... hiện toàn bộ
The viscosity of a fluid containing small drops of another fluidThe 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