CONTENTS (continued). 



P1GB 



On the Ionisation of Atmospheric Air. By C. T. R. Wilson, M.A., F.R.S., 



Fellow of Sidney Sussex College, Cambridge 151 



On the Preparation of Large Quantities of Tellurium. By Edward 

 Matthey, A.R.S.M. Communicated by Sir G-eobge Stokes, Barfc., 

 F.R.S. 161 



The Transmission of the Trypanosoma JEvansi by Horse Flies, and other 

 Experiments pointing to the probable Identity of Surra of India and 

 Nsgana or Tsetse-fly Disease of Africa. By Leonard Rogers, M.D., 

 M.R.C.P., Indian Medical Service. Communicated by Major D. Bruce, 

 R.A.M.C., F.R.S 163 



Meeting of March 21, 1901, and Lecture delivered 170 



Meeting of March 28, 1901, and List of Papers read 170 



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