Page 



Supplement to a Paper read February 17, 1859, "On the Influence 

 of White Light, of the different Coloured Kays and of Darkness, on 

 the Development, Growth, and Nutrition of Animals." By Horace 

 Dobell, M.D 184 



On the Effects produced in Human Blood-corpuscles by Sherry Wine, 

 &c. By William Addison, Esq., F.E.S 186 



Researches on the Phosphorus-Bases. No. VII. Triphosphonium- 

 Compounds. By A. W. Hofmann, LL.D., F.R.S. &c 189 



Note respecting the Circulation of Gasteropodous Mollusca and the 

 supposed Aquiferous Apparatus of the Lamellibranchiata. By 

 F. J. H. Lacaze-Duthiers 193 



On the Repair of Tendons after their subcutaneous division. By 

 Bernard E. Brodhurst, Esq 196 



On the Curvature of the Indian Arc. By the Venerable John H. 

 Pratt, M.A., Archdeacon of Calcutta 197 



Comparison of some recently determined Refractive Indices with 

 Theory. By the Rev. Professor Baden Powell, M.A., F.R.S. . . 199 



On the Electric Conducting Power of Alloys. By A. Matthiessen, 

 Ph.D ; . 205 



On the Specific Gravity of Alloys. By A. Matthiessen, Ph.D 207 



On an extended Form of the Index Symbol in the Calculus of Opera- 

 tions. By William Spottiswoode, Esq., M.A., F.R.S 207 



Problem on the Divisibility of Numbers. By F. Elefanti, Esq 208 



On the Structure of the Chorda Dorsalis of the Plaglostomes and some 

 other Fishes, and on the relation of its proper Sheath to the 

 development of the Vertebrae. By Professor A. Kolliker 214 



Remarks on the late Storms of October 25-26 and November 1, 1859. 

 By Rear-Admiral FitzRoy, F.R.S 222 



Notes of Researches on the Poly- Ammonias. No. VII. On the 

 Diatomic Ammonias. By A. W. Hofmann, LL.D., F.R.S. &c. . . 224 



On the Forces that produce the great Currents of the Air and of the 

 Ocean. By Thomas Hopkins, Esq 235 



On the Movements of Liquid Metals and Electrolytes in the Voltaic 

 Circuit. By George Gore, Esq 235 



Abstract of a series of Papers and Notes concerning the Electric Dis- 

 charge through Rarefied Gases and Vapours. By Professor Pliicker, 

 of Bonn, For. Memb. R.S 256 



On the Interruption of the Voltaic Discharge in Vacuo by Magnetic 

 Force. By J. P. Gassiot, Esq., F.R.S 269 



On Vacua as indicated by the Mercurial Siphon-Gauge and the Elec- 

 trical Discharge. By J. P. Gassiot, Esq., F.R.S 274 



On the alteration of the Pitch of Sound by conduction through dif- 

 ferent Media. By Sydney Ringer, Esq 276 



