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Synopsis.—In the first article of this series, the author proposed a hyperbolic formula, for the accurate representation of long band series. The present paper initiates a more general discussion of this formula, and of the experimental results which the author has since obtained. Detailed...
Synopsis.—Theoretical expressions are derived giving the rate of escape of photo-electrons from the surface of a thin metallic film as a function of its thickness. These expressions result from various assumptions regarding the probability of escape of an electron photoelectrically excited at a...
Synopsis.—To meet the demand for a gauge which will measure vapor pressures in the range between that which can be measured by the Knudsen Gage (.001 mm.) and the ordinary mercury manometer, a new type of gage has been devised. This consists of a rather large mercury manometer in one arm of...
Synopsis.—In continuation of a previous note by Anslow and Howell graphic and algebraic relations are derived between the logarithms of the atomic numbers and of the ν , ν 1 + ν 2 , ν 1 and ν 2 constant frequency differences occurring in the spectral series of alternate members of the same...
Synopsis.—A series of experiments was performed to determine the conditions affecting the period of an electrically operated tuning fork with the following results: (1) The more massive the base of the fork and the table upon which it is placed the smaller is the period. This effect, however,...
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