C 0 N T E N T S. 
PART I 
I. The Influence of Stress and Strain on the Action of Physical Forces. By Herbert 
Tomlinson, B.A. Communicated by Professor W. Grylls Adams, M.A., 
F.R.S .page 1 
II. On the Specific Resistance of Mercury. By Lord Hayleigh, F.R.S., Professor 
of Experimental Physics in the University of Cambridge, and Mrs. II. 
Sidgwick.173 
III. On the Ultra-Violet Spectra of the Elements .—Part I. Iron (with a map), and 
Part II. By G. D. Liveing, M.A., F.R.S., Professor of Chemistry, and 
J. Dewar, M.A., F.R.S., Jacksonian Professor, University of Cambridge 187 
IV. Experiments on the Value of the British Association Unit of Resistance. Part I. 
by R. T. Glazebrook, M.A., Fellow and Assistant Lecturer of Trinity College, 
Cambridge, Demonstrator of Physics in the Cavendish Laboratory, and J. M. 
Dodds, B.A., Fellow of St. Peters College. Part II. by R. T. Glazebrook 
and E. B. Sargant. M.A., Trinity College. Communicated by Lord Ray¬ 
leigh, M.A., F.R.S .223 
V. On the Normal Paraffins .—Part TV. By C. Schorlemmer, F.R.S., and T. E. 
Thorpe, F.R.S .269 
VI. On a Collection of Rock Specimens from the Island of Socotra. By T. G. Bonney, 
M.A., F.R.S., F.G.S., Professor of Geology in University College, London, and 
Fellow of St. John’s College, Cambridge .273 
VII. Experiments, by the Method of Lorentz, for the further Determination of the 
Absolute Value of the British Associat ion Unit of Resistance, with an Appendix 
on the Determination of the pitch of a Standard Tuning-Fork. By Lord 
Rayleigh, F.R.S., Cavendish Professor of Experimental Physics in the Univer¬ 
sity of Cambridge, and Mrs. H. Sidgwick.295 
VIII. On Abel’s Theorem and Abelian Functions. By A. R. Forsyth, B.A., Fellow 
of Trinity College, Cambridge, Professor of Mathematics in University College t 
Liverpool. Communicated by Professor Cayley, F.R.S .323 
Index to Part /. . ... 369 
