Vi CONTENTS OF VOL. XL. — FOURTH SERIES. 



Page 

 Dr. E. J. Mills on Statical and Dynamical Ideas in Chemistry. 



— Part II. Chemical Substance and Chemical Functions . . 259 

 Mr. G. Gore on the Magnetism of Electrodynamic Spirals . . , . 264 



M. A. Cazin on Internal Work in Gases 268 



Dr. W. J. M. Rankine on the Thermodynamic Acceleration and 



Retardation of Streams 288 



Dr. W. J. M. Rankine on Thermodynamics 291 



M. S. Merz on an Object-glass Spectral apparatus. (With a 



Plate.) 294 



Mr. C. Tomlinson on the Action of Low Temperatures on Su- 

 persaturated Saline Solutions 295 



Mr. A. S. Davis's Addendum to a Theory of Nebulae and Comets. 300 

 Notices respecting New Books : — 



Dr. Tyndall's Researches on Diamagnetism and Magne- 

 crystallic Action, including the question of Diamagnetic 



Polarity 301 



Proceedings of the Royal Society : — 



Dr. W. Huggins on the Spectra of Erbia and some other 



Earths 302 



Proceedings of the Geological Society : — 



Mr. R. J. L. Guppy on the Discovery of Organic Remains 



in the Caribbean Series of Trinidad 309 



Mr. R. Tate on the Palaeontology of the Junction-beds 



of the Lower and Middle Lias in Gloucestershire .... 309 

 Mr. T. H, C. Hood on the Waipara River, New Zealand. 310 

 Experimental Research on the Influence of Heat on Electromo- 

 tive Force, by Dr. L. Bleekrode 310 



On Tests for the Perfection and Parallelism of Plane Surfaces of 

 Glass, by Wolcott Gibbs, M.D., Rumford Professor in Har- 

 vard University 311 



NUMBER CCLXVIII.— NOVEMBER. 



Prof. F. Zollner on the Temperature and Physical Constitution 

 of the Sun. (With a Plate.) 313 



Mr. C. Tomlinson on a Salt that is invisible in its Mother-liquor. 328 



Prof. Cayley on the Geodesic Lines on an Oblate Spheroid . . 328 



Mr. J. C. Douglas's Reply to Mr. Templeton's "Remarks sug- 

 gested by Mr. Douglas's Account of a New Optometer " . . 340 



Mr. F. Guthrie on Approach caused by Vibration. (With a 

 Plate.) 345 



Prof. Plateau's Experimental and Theoretical Researches into 

 the Figures of Equilibrium of a Liquid Mass without Weight. 

 — Ninth, Tenth, Eleventh and last Series 355 



Proceedings of the Royal Society : — 



The Earl of Rosse on the Construction of Thermopiles. 369 



