CONTENTS. 
(A.) 
VOL. 181. 
I. 0)1 the Effect of Tem'pevature on the Specific Inductive Capacitij of a Dielectric. 
By W. Cassie, M.A., Trinity College, Camhridge, Examiner in the Univer¬ 
sities of Aberdeen and Durham. Communicated by J. J. Thomson, M.A., 
E.B.S., Cavendish Professor of Experimental Physics in the University of 
Cambridge .. . page 1 
II. On the Interchange of the Variables in Certain Linear Differential Operators. 
By E. B. Elliott, AI.A., Eellow of Queens College, Oxford. Coimnunicated 
Professor Sylvester, E.R.S. .19 
III. The Bakerian Lecture, — A Magnetic Survey of the British Isles for the Epoch 
January 1, 1886. By A. W. Bucker, M.A., E.R.S., and T. E. Thorpe, 
B.Sc., Ph.D., E.R.S. .53 
IV. On the Effects of Pressui-e on the Magiietisation of Cobalt. By C. Chree, 
M.A., Eellow of King's College, Cambi'idge. Communicated by Professor J. J. 
Thomson, E.R.S. . 329 
V. On the Theory of Eree Stream Lines. By J. H. Michell, Trinity College, Cam¬ 
bridge. Communicated by Professor J. J. Thomson, E.R.S. . . . . 389 
VI. On the Extension and Elexure of Cylindrical and Spherical Thin Elastic Shells. 
By A. B, Basset, AI.A., E.R.S. .. . 433 
