. The London, Edinburgh and Dublin philosophical magazine and journal of science. ex. 728 Dr. R. W. Boyle on the Behaviour of The ordinates represent ionization current and the abscissaethe corresponding temperatures. The three curves, A, B, andC, represent three widely different quantities of emanation,which correspondingly required three measuring devicesdiffering widely in sensitiveness. The scales o£ ordinatesare therefore very unequal : scale of C > scale of B > scaleof A. In Table I. are given the experimental details concerningthe curves shown in fig. 2. The Partial Pressures ofEm
. The London, Edinburgh and Dublin philosophical magazine and journal of science. ex. 728 Dr. R. W. Boyle on the Behaviour of The ordinates represent ionization current and the abscissaethe corresponding temperatures. The three curves, A, B, andC, represent three widely different quantities of emanation,which correspondingly required three measuring devicesdiffering widely in sensitiveness. The scales o£ ordinatesare therefore very unequal : scale of C > scale of B > scaleof A. In Table I. are given the experimental details concerningthe curves shown in fig. 2. The Partial Pressures ofEmanation are calculated—assuming Boyles law to holdapproximately—from the fact that the equilibrium amountof emanation of 1 gm. of radium has a volume of Ob* These pressures are included merely to give anidea of the extreme tenuities of the emanation before or aftercondensation. (The abbreviation means the amountof emanation in radioactive equilibrium with the stated numberof milligrams of radium element.) Table I. (1) Curve. (2)Quantity ofEmanation. (3)
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