PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



VOL. XXX. 



No. 202. 



List of Candidates for Election. 



CONTENTS. 



March 4, 1880. 



. 197 



PAGE 



I. Fired G-unpowder. Note on the Existence of Potassium Hyposulphite in 

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

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



IT. 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 



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

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



I. 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 Hatjghton, M.D. (Dubl.), D.C.L. (Oxon.), F.R.S., Fellow 

 of Trinity College, Dublin 219 



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



Trinity College, Cambridge 225 



III. Report on Phyto-Palseontological Investigations of the Fossil Flora of 

 Alum Bay. By Dr. Cons tan tin Baron Ettingshausen, Professor in 

 the University of Graz, Austria . . . . . . . .228 



LL.D., F.R.S 



210 



March 11, 1880. 



For continuation of Contents see 4th page of the Wrapper. 



Price Three Shillings and Sixpence. 



