VI 



K\|M inn. nt> nn ;i Fundamental Question in Electro-Optics: Redm-timi 

 ..r Ki-lative Retardations to Absolute. By John Kerr, LL.D., F.R.S. 252 



(n the Kicjuati'.n of Silver Copper Alloys. By Edward Matthey, 

 K.( \S., Assoc. Roy. Sch. Mines ............. ..................... .......................... 265 



\ < oiitrilniti'iii t-> tin- Stmly of Descending Degenerations in the Brain 

 ami Spinal < '<>nl, and of the Seat of Origin and Paths of Conduction 

 ..f the Fita in Absinthe Epilepsy. By Rul>ert Boyce, M.B., 

 Assistant Professor of Pathology, University College, London ............ 269 



A Research into the Elasticity of the Living Brain, and the Conditions 

 governing the Recovery of the Brain after Compression for Short 

 Periods. By A. G. Levy, M.B. (London).. ............................................ 275 



< in the Effect* produced on the Circulation and Respiration by Gun- 

 >lmt Injuries of the Cerebral Hemispheres. By S. P. Kramer, M.D., 

 an.l Yi.-tor Horeley, M.B., F.R.C.S., F.R.S., Professor of Pathology 

 in University College, London .................................................................... 278 



On the Influence of Carbonic Acid and Oxygen upon the Coagulability 

 of the Blood in Vivo. By A. E. Wright, M.D. (Dubl.X Professor of 

 Pathology, Army Medical School, Netley ................................................ 279 



On the Disappearance of the Leucocytes from the Blood, after Injection 

 of Peptone. By Surgeon-Captain David Bruce, A.M.S., Army 

 M .-dical School, Netley ............................................................................ _ 295 



List of Presents ... 300 



Account of the appropriation of the sum of .4,000 (the Government 

 Grant) annually voted by Parliament to the Royal Society, to be em- 



Eloyed in aiding the Advancement of Science (continued from vol. 

 ii, p. 321). April 1, 1893, to March 31, 1894 301 



Report of the Incorporated Kew Committee for the Year ending 

 December 31, 1893 307 



No. 334. April 19, 1894. 



< n an Anomaly encountered in Determinations of the Density of 



Nitrogen Gas. By Lord Rayleigh, Sec. R.S 340 



< >n Variations observed in the Spectra of Carbon Electrodes, and on 



the Influence of one Substance on the Spectrum of another. By W. 



N. Hartley, F.R.S., Royal College of Science, Dublin .". 344 



Electrical Interference Phenomena somewhat analogous to Newton's 

 Rings, but exhibited bv Waves along Wires. By Edwin H. Barton, 

 B.Sc.,late "1851 Exhibition" Science Scholar....! 349 



<>n Rocks and Minerals collected by Mr. W. M. Conway in the Kara- 

 koram Himalayas. By Professor T. G. Bonney, D.Sc., F.R.S., and 

 Miss C. A. Raisin, B.Sc .. 3">0 



Contributions to the Chemistry of ChlorophvlL No. V. By Edward 

 Schunck, F.R.S .'. 3:>1 



Thermoelectric Properties of Salt Solutions. By George Frederick 

 Knu-ry, B.A., LL.M., of the Inner Temple, late Scholar of Trinity 

 College, Cambridge :{."><; 



Experimental Determination of Poisson's Ratio. By C. E. Stroraeyer 373 

 List of Presents .., 383 



