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CONTENTS. 
(A) 
VOL. 199. 
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page v 
I. The Stability of a Spherical Nebula. By J. H. Jeans, B.A., Fellow of Trinity 
College, and Isaac Newton Student in the University of Cambridge. Com¬ 
municated by Professor G. H. Darwin, F.R.S. . page 1 
II. Continuous Electrical Calorimetry. By Hugh L. Callendar, F.R.S., Quean 
Professor of Physics at University College, London .55 
III. On the Capacity for Heat of Water between the Freezing and Boiling-Points, 
together with a Determination of the Mechanical Equivalent of Heat in Terms 
of the International Electrical Units.—Experiments by the Continuous-Flow 
Method of Calorimetry, performed in the Macdonald Physical Laboratory of 
McGill University , Montreal. By Howard Turner Barnes, 31. A.Sc., 
D.Sc., Joule Student. Communicated by Professor H. L. Callendar, 
F.R.S. .149 
IV. On a Throw-Testing Machine for Reversals of Mean Stress. By Professor 
Osborne Reynolds, F.R.S., and J. H. Smith, M.Sc., Wh.Sc., Late Fellow 
of Victoria University, 1851 Exhibition Scholar .265 
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