CONTENTS OF VOL. II. FIFTH SERIES. V 



Page 

 On the Electromagnetic Action of Electric Convection, by Dr. 



Helmholtz 233 



New Eorm of Compensating Pendulum, by J. Lawrence Smith, 



Louisville, Ky 237 



On the Uniform Motion of Water, both in small Canals and 



Trenches and in Streams and in Rivers, by M. Hagen .... 239 

 A Glass Circle for the Measurement of Angles, by Lewis M. 



Rutherfurd 239 



NUMBER XT.— OCTOBER. 



Dr. Croll on the Transformation of Gravity 241 



M. C. Szily on the Dynamical Signification of the Quantities 



occurring in the Mechanical Theory of Heat 254 



Dr. W. Ramsay on Picoline and its Derivatives 269 



Prof . W. H. Miller on a new Eorm of the Reflective Goniometer 281 



Prof. A. Des Cloiseaux on the three Types of Humite 286 



Prof. J. J. Sylvester on Spherical Harmonics 291 



Notices respecting New Books : — 



Sir W. Thomson's Tables for facilitating Sumner's Method 



at Sea 307 



Mr. J. W. Barry on Railway Appliances. A Description 

 of details of Railway Construction subsequent to the 

 completion of the Earthworks and Structures, including 



a short notice of Railway Rolling Stock 310 



Mr. R. E. Day's Exercises in Electrical and Magnetic 



Measurement, with Answers t . . 312 



Proceedings of the Royal Society : — 



Dr. A. Schuster on the Nature of the Eorce producing the 



Motion of a Body exposed to Rays of Heat and Light . . 313 

 Dr. J. Hopkinson on the Residual Charge of the Ley den 



Jar 314 



Proceedings of the Geological Society : — 



Mr. M. A. Helland on the Ice-Ejords of North Greenland 

 and on the formation of Ejords, Lakes, and Cirques in 



Norway and Greenland 315 



Mr. C. L. Morgan on the Drift of Brazil 316 



On the Photometry of Coloured Elames, by M. Gouy 317 



On new Minerals, by Prof. C. U. Shepard 319 



On the Influence of Sonorous Vibrations upon the Radiometer, 

 by J. Jeannel 320 



NUMBER XII.— NOVEMBER. 



Mr. R. Sabine on a Method of Measuring the Contour of Elec- 

 tric Waves passing through Telegraph Lines 321 



