V 



Page 



Note on Electrolytic Experiments. By James Dewar, M.A., F.E.S., 

 Jacksonian Professor, University of Cambridge 170 



February 19, 1880.. 



On some of the Effects produced by an Induction Coil with a De Meritens 

 Magneto- Electric Machine. By William Spottiswoode, D.C.L., P.E.S. 173 



February 26, 1880. 



On the Solubility of Solids in Gases. By J. B. Hannay, F.R.S.E., F.C.S., 

 and James Hogarth, F.C.S 178 



On the Artificial Formation of the Diamond. By J. B. Hannay, 

 F.RS.E., F.C.S 188 



List of Presents 189 



No. 202.— March 4, 1880. 

 List of Candidates for Election 197 



Fired Gunpowder. Note on the Existence of Potassium Hyposulphite in 

 the Solid Residue of Fired Gunpowder. By Captain Noble (late R.A.), 

 F.R.S., and F. A. Abel, C.B., F.R.S., V.P.C.S 198 



On the Dynamo-Electric Current, and on certain Means to Improve its 

 Steadiness. By C. William Siemens, D.C.L., LL.D., F.R.S 208 



On the Influence of Electric Light upon Vegetation, and on certain 

 Physical Principles involved. By C. William Siemens, D.C.L., LL.D., 

 F.R.S 210 



March 11, 1880. 



The Croonian Lecture. — On some Elementary Principles in Animal 

 Mechanics. No. IX. The Relation between the Maximum Work 

 done, the Time of Lifting, and the Weights Lifted by the Arms. By 

 the Rev. Samuel Haughton, M.D. (Dubl.), D.C.L. (Oxon.), F.R.S., 

 FeUow of Trinity College, Dublin 219 



On the Tonicity of the Heart and Arteries. By W. H. Gaskell, M.D., 

 Trinity College, Cambridge 225 



Report on the Phyto-Palaeontological Investigations on the Fossil Flora 

 of Alum Bay. By Dr. Constantin Baron Ettingshausen, Professor in 

 the University of Graz, Austria 228 



March 18, 1880. 



On the Structure of the Immature Ovarian Ovum in the common Fowl 

 and in the Rabbit. To which is appended some Observations upon the 

 Mode of Formation of the Discus Proligerus in the Rabbit, and of the 

 Ovarial Glands or ; ' Egg-tubes" in the Dog. By E. A. Schafer, F.R.S. 

 (Plates 2, 3, 4) 



