VI CONTENTS OF VOL. XXXI. FIFTH SERIES. 



Page 



Sir John Conroy on the Change in the Absorption-Spectrum 

 of Cobalt Glass produced by Heat 317 



Mr. M. Carey Lea on Allotropic Silver.— Part II 320 



Prof. A. Anderson on Coefficients of Induction 329 



Mr. A. A. Michelson on the Application of Interference- 

 Methods to Spectroscopic Measurements. — I. (Plate VII.) 338 



Mr. T. H. Blakesley's Further Contributions to Dynamometry, 

 or the Measurement of Power 346 



Prof. W. E. Ayrton and Mr. J. F. Taylor on Proof of the 

 Generality of certain Formulae published for a Special Case 

 by Mr. Blakesley 354 



Prof. W. N. Hartley on Relations between the Lines of 

 various Spectra 359 



Notices respecting New Books : — 



Mr. H. Whiting's Short Course of Experiments in Phy- 

 sical Measurement 363 



Mr. J. H. Cotterill's The Steam-Engine considered as a 

 Thermodynamic Machine 364 



On the Reflexion of Rays of Electrical Force from Plates of 

 Metal and of Sulphur, by Prof. Kleinencic, in Griitz .... 366 



On the Optical Properties of u-Monobromonaphthaline, bv 

 B. Walter '. 367 



On the Line Spectra of the Elements of Mendelejeff's Second 

 Group, by Prof. Kayser and Prof. Runge 368 



NUMBER CXCIL— MAT. 



Mr. W. W. J. Nicol on the Mutual Solubility of Salts in 

 Water.— Part I. (Plate VIII.) 369 



Mr. H. M. Vernon on the Maximum Density of Water .... 387 



Mr. C. Tomlinson on some Effects of small Quantities of 

 Foreign Matter on Crystallization 393 



Mr. C. Barus on a Comparison of the Bourdon, the Tait, and 

 the Amagat High-Pressure Gauges 400 



Mr. L. R. Wilberforce on the Calculation of the Coefficient of 

 Viscosity of a Liquid from its Rate of Flow through a 

 Capillary Tube 407 



Dr. Svante Arrhenius on the Electric Conductivity of Hot 

 Gases 415 



Mr. Sydney Lupton on the Reduction of the Results of Ex- 

 periments with special reference to the Hydrate-theory of 

 Solution 418 



Dr. T. Muir on a peculiar Determinant of the Sixth Order . . 429 



Prof. A. L. Selby on the Variation of Surface-Tension with 

 Temperature 430 



Mr. F. J. Smith on some New Methods of Investigating 

 the Points of Recalescence in Steel and Iron 433 



