Volume 14, Issue 9, 01 September 1943
Index of content:
14(1943); http://dx.doi.org/10.1063/1.1715015View Description Hide Description
Recently, there has been considerable agitation in the American Physical Society for greater participation in the affairs of the Society by physicists in industry. At the suggestion of the Council of the Society there is given here a brief review of the discussion of the past few months. There follows first a note by Dr. Karl K. Darrow, Secretary of the Society, giving the background of this discussion and explaining the Council's attitude regarding the formation of divisions within the Society. Then follow excerpts from letters written by members of the Society which indicate the general trend of the discussion. Since the letters were not sent in for publication no names are attached to the excerpts. If space permits additional comments will be printed as they are received.—The Editor.
14(1943); http://dx.doi.org/10.1063/1.1715020View Description Hide Description
14(1943); http://dx.doi.org/10.1063/1.1715023View Description Hide Description
An integral‐differential equation is developed which gives the intensity within a scattering medium as a function of position and direction. The scattering properties of an infinitesimal volume of the medium are assumed known, but no special assumption is made concerning their nature. The equation is put in a form suitable for numerical solution.
14(1943); http://dx.doi.org/10.1063/1.1715024View Description Hide Description
The differential equations governing the deflection of structural elements such as loaded cords and beams freely suspended or resting on an elastic foundation are solved operationally. The operational method simplifies the analysis because it reduces the number of arbitrary constants to be determined and enables the effect of concentrated loads or applied couples to be determined directly.
14(1943); http://dx.doi.org/10.1063/1.1715025View Description Hide Description
Radioactive mercury,Hg197, was prepared by deuteron bombardment of gold. This isotope was used as a tracer to establish an average concentration of 0.01 mg Hg per m3 of air in a particular industrial operation suspected of causing chronic mercurialism. Mercury in quantities of 10−8 g was detected, and the method offers possibilities of higher sensitivity and more general application.