CONTENTS of N° 254.— Fourth Series. 



XIX. On the Construction of the Galvanometer used in Electrical 

 Discharges, and on the Path of the Extra Currents through the Elec- 

 tric Spark. By E. Edlund page 169 



XX. On some Phenomena of Binocular Vision. By Joseph 

 LeConte, Professor of Chemistry and Geology in the University of 

 South Carolina 179 



XXI. On the Formation of Bubbles of Gas and of Vapour in Li- 

 quids. By Charles Tomlinson, F.R.S., F.C.S 204 



XXII. On the Production of a Columnar Structure in Metallic 

 Tin. By Dr. T. Fritzsche of St. Petersburg 207 



XXIII. Fundamental Principles of Molecular Physics. Reply to 

 Professor Bayma. By Professor W. A. Norton 208 



XXIV. On a Remarkable Structural Appearance in Phosphorus. 



By Charles Tomlinson, F.R.S., F.C.S . 215 



XXV. On the Supposed Action of Light on Combustion. By 

 Charles Tomlinson, F.R.S., F.C.S 217 



XXVI. On the Opinion that the Southern Hemisphere loses by 

 Radiation more Heat than the Northern, and the supposed Influence 

 that this has on Climate. By James Crqll, of the Geological Sur- 

 vey of Scotland , 220; 



XXVII. Description of some Lecture-experiments in Electricity. 



By Professor G. C. Foster, F.R.S 229 



XXVIII. Proceedings of Learned Societies : — 



Geological Society 235 



XXIX. Intelligence and Miscellaneous Articles : — 



Note on Electrolytic Polarization, by Professor Tait 243 



o 



On the Spectrum of the Aurora Borealis, by J. A. Angstrom . . 246" 

 On the Thermal Energy of Molecular Vortices, by W. J. Mac- 

 quorn Rankine, C.E., LL.D., F.R.SS. Lond. & Edinb. &c. . . 247 



It is requested that all Communications for this Work may be addressed,, 

 post-paid, to the Care of Messrs. Taylor and Francis, Printing Office, Fed 

 Lion Court, Fleet Street, London, 



