India's Contribution to Geodesy. By General J. T. Walker, RE., 

 C.B., F.B.S., LL.D., late Surveyor-General of India 157 



List of Presents 159 



May 30, 1895. 



On the Temperature Variation of the Thermal Conductivity of Bocks. 

 By Lord Kelvin, P.B.S., and J. B. Erskine Murray, B.Sc., 1851 

 Exhibition Scholar 162 



The Kinematics of Machines. By T. A. Hearson, MJnst.C.E., Pro- 

 fessor of Mechanism and Hydraulic Engineering, Boyal Indian 

 Engineering College, Coopers Hill 167 



On the Effect of Pressure of the Surrounding Gas on the Temperature 

 of the Crater of an Electric Arc Light. Preliminary Notes of Obser- 

 vations made at Daramona, Streete, co. Westmeath. By W. E. 

 Wilson 174 



Note on the Motions of and within Molecules ; and on the Significance 

 of the Batio of the two Specific Heats in Gases. By G. Johnstone 

 Stoney, M.A., D.Sc., F.B.S 177 



On the Velocities of the Ions. By W. C. Dampier Whetham, M.A., 

 Fellow of Trinity College, Cambridge 182 



List of Presents .., 188 



No. 350. June 13, 1895. 



Election of Fellows 191 



On the new Gas obtained from Uraninite. Fourth Note. By J. 

 Norman Lockyer, C.B., F.B.S 192 



On the new Gas obtained from Uraninite. Fifth Note. By J. Nor- 

 man Lockyer, C:B., F.R.S 193 



Further Observations on the Organisation of the Fossil Plants of the 

 Coal-Measures. Part III. Lygtnodendron and Heterangium. By 

 W. C. Williamson, LL.D., F.B.S., Emeritus Professor of Botany in 

 the Owens College, Manchester, and D. H. Scott, M.A., Ph.D., 

 F.B.S., Honorary Keeper of the Jodrell Laboratory, Royal Gardens, 

 Kew 195 



On the Origin of the Triradiate Spicules of Leucosolenia. By E. A. 

 Minchin 204 



Experimental Degenerations following Unilateral Lesions of the Cortex 

 Cerebri in the Bonnet Monkey ( Macacus Sinicus). By E. Linden 

 Mellus, M.D 206 



On the Cause of the Differences in Lichtenberg's Dust-Figurea Pre- 

 liminary Note. By Silvanus P. Thompson, D.Sc., F.B.S 214 



Theorems on the Attraction of Ellipsoids for certain Laws of Force 

 other than the Inverse Square. By Dr. E. J. Bouth, F.B.S 215 



List of Presents ... 217 



