CONTENTS (continued). 



March 16, 1893. 



Croonian Lecture. — The Position of Pathology among Biological Studies. 

 By Professor Rttdole Virchow, For. Mem. R.S. . 



114 



March 23, 1893. 



I. On the Composition of Water by Volume. By Alexander Scott, M.A., 



D.Sc., Jacksonian Demonstrator in the University of Cambridge . . 130 



II. On the Densities of the Principal G-ases. By Loed Rayleigh, Sec. U.S. 134 



III. On the Variation of Surface Energy with Temperature. By William 



Eamsat, Ph.D., F.R.S., and John Shields, B.Sc, Ph.D. . . .150 



IV. The Absolute Thermal Conductivities of Copper and Iron. By 



R. Wallace Stewart, B.Sc. (Lond.), Assistant Lecturer and 

 Demonstrator in Physics, University College, Bangor .... 151 



V. Preliminary Notice on the Arrow -Poison of the Wa Nyika and other 

 Tribes of East Equatorial Africa, with special reference to the Che- 

 mical Properties and Pharmacological Action of the Wood from which 

 it is prepared. By Thomas R. Fraser, M.D., F.R.S., Professor of 

 Materia Medica in the University of Edinburgh, and J oseph Tillie, 

 M.D. (Edin.) ... . . 153 



List of Presents 



160 



