CONTENTS. 
I. On the Ratio of the Specific Heats of the Paraffins, and their Monohalogen 
Derivatives. By J. W. Capstick, M.Sc. {Viet.), B.A. {Camh.), Scholar and, 
Coutts-Trotter Student of 'Trinity College, Canibridge. Communicated hy 
Professor J. J. Thomson, F.R.S .page 1 
II. On a Special Form of the General Equation of a Cubic Surface and on a 
Diagram Representing the 'Twenty-seven Lines on the Surface. By H. M. 
Tayloe, M.A., Fellow of 'Trinity College, Cambridge. Coninnmicated by 
A. K. Foesyth, Sc.D., F.R.S. .37 
III. Contributions to the Mathematical 'Theory of Evolution. By Kael Peaeson, 
University College, London. Communicated by Professor Heneici, F.R.S. 71 
IV. A Certain Class of Generating Functions in the 'Theory of Numbers. By Major 
P. A. MacMahon, R.A., F.R.S . Ill 
V. Flame Spectra at High 'Temperatures. —Part I. Oxy-hydrogen Blow-pipje S'q)ectra. 
By W. N. Haetley, F.R.S .161 
VI. On a Spherical Vortex. By M. J. M. Hill, M.A., D.Sc., Professor of Mathe¬ 
matics at University College, London. Communicated by Professor Heneici, 
F.Li.S. .213 
VH. On Plane Cubics. By Chaelotte Anoas Scott. Communicated by Dr. A. P. 
Foesyth, F.R.S. .247 
VHI. On the Whirling and Vibration of Shafts. By Stanley Dunkeeley, M.Sc., 
Berkeley Fellow of the Owens College, Manchester. Communicated by Pro¬ 
fessor OsBOENE Keynolds, F.R.S. . 279 
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