CONTENTS OF VOL. XXXIIL 



(FIFTH SEEIES). 



NUMBEE CC.— JANUAEY 1892. 



Page 

 Lord Eayleigh on Eeflexion from Liquid Surfaces in the 



Neighbourhood of the Polarizing Angle 1 



Messrs. E. L. Nichols and B. W. Snow on the Character of 



the Light emitted by Incandescent Zinc Oxide 19 



Dr. G. Gore on a Method of Measuring Loss of Energy due 



to Chemical Union &c 28 



Dr. J. W. L. Gflaisher on the Connexion between Eecurring 

 Formulae involving Sums of Divisors and the Corresponding 

 Formulae involving Differences between Sums of Even and 



Uneven Divisors 54 



Prof. A. Gray on the Calculation of the Induction-Coefficients 

 of Coils, and the Construction of Standards of Inductance, 



and on Absolute Electrodynamometers 62 



Mr. J. Larmor on the Iufluence of Flaws and Air-cavities on 



the Strength of Materials 70 



Mr. E. A. Lehfeldt on a G-alvanometric Method of Mea- 

 suring H 78 



Mr. J. Brown on the Theory of Electrolytic Conduction of 

 Clausius ; and on some recent Evidence for the Dissociation 



Theory of Electrolysis , 82 



Mr. H. Crew on a New Method for obtaining a Constant 



Temperature . < 89 



Mr. A. P. Laurie on the Existence of a Compound of Gold 



and Tin 94 



Prof. D. Mendeleef on the Variation in the Density of Water 



with the Temperature 99 



Mr. S. U. Pickering on the Densities of Sulphuric-Acid 



Solutions 132 



Notices respecting New Books : — 



Prof. Ostwald's ' Solutions ; ' being the Fourth Part of a 



Text-Book of General Chemistry 144 



Dr. Watts's Index of Spectra, Appendix B 147 



Mr. Gore's Star Groups 147 



Dr. Williamson's Elementary Treatise on the Integral 



Calculus 14S 



Dr. Besant's Solutions of Examples in Conic Sections, 

 treated Geometrically 149 



