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VII. 





VIII. 



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Contents of PROCEEDINGS, No. A 529. May, 1907. 



Price 3s. 6d. 



Page 



ON THE EFFECT OF HIGH TEMPERATURES ON RADIUM EMANATION 



AND ITS PRODUCTS. By Walter Makower, Assistant Lecturer in Physics, and Sidney Russ, 

 Demonstrator in Physics in the University of Manchester . . . . . . .... . . . . . . . . 158 



ON THE PURIFICATION AND TESTING OF SELENION. Bv R. 



THRELFALL, F.R.S 167 



ON THE SPECIFIC INDUCTIVE CAPACITY OF A SAMPLE OF HIGHLY 



PURIFIED SELENION. By O. U. Vonwiller, B.Sc, Demonstrator in Physics, and W. H. Mason, 

 B.Sc, Deas-Thomson Scholar in Physics in the University of Sydney .. .. .. .. .. .. .. 175 



ON THE THEORY OF CORRELATION FOR ANY NUMBER OF VARIABLES, 



TREATED BY A NEW SYSTEM OF NOTATION. By G. Udny Yule, Newmarch Lecturer on 

 Statistics, University College, London . . . . . . . . . . . . . . . . . . . . . . . . 182 



THE GRAVITATIONAL STABILITY OF THE EARTH. By A. E. H. Love, 



F.R.S., Sedleian Professor of Natural Philosophy in the University of Oxford. (Abstract).. .. .. .. 194 



ON THE DISPERSION OF ARTIFICIAL DOUBLE REFRACTION. By 



L. N. G. Filon, M.A., D.Sc, Fellow and Lecturer in Mathematics of University College, London. (Abstract) 200 



ON THE REFRACTIVE INDICES OF GASEOUS POTASSIUM, ZINC, 



CADMIUM, MERCURY, ARSENIC, SELENIUM, AND TELLURIUM. By C. Cuthbertson and 



E. Parr Metcalfe, B.Sc. (Abstract) 202 



ON THE ABSORPTION OF WATER BY COTTON AND WOOL. By 



Morris W. Travers, D.Sc, F.R.S., Director of the Indian Institute of Science, Bangalore 204 



THE TOTAL IONISATION OF VARIOUS GASES BY THE a-RAYS OF 



URANIUM. By T. H. Laby, 1851 Exhibition Research Scholar of the University of Sydney ; Emmanuel 

 College. Cambridge .. .. .. .. .... .. .. .. .. .. .. .. .. .. 206 



ON THE IONISATION OF VARIOUS GASES BY a-, (3-, AND y-RAYS. 



By R. D. Kleeman, B.Sc, 1851 Exhibition Research Scholar of the University of Adelaide; Emmanuel 

 College, Cambridge .. 220 



ON THE EXPLOSION OF PURE ELECTROLYTIC GAS. By Harold B. 



Dixon, M.A., F.R.S., Professor of Chemistry, and Lawrence Bradshaw, M.Sc, Late Dalton Scholar of the 

 University of Manchester. (Plates 2 and 3) 234 



THE FIRING OF GASEOUS MIXTURES BY COMPRESSION. By Lawrence 



Bradshaw, M.Sc, Ph.D. (Plate 3) 236 



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