PROCEEDINGS OF 
THE ROYAL SOCIETY. 
Szrorion B.—BrotogicAL SCIENCES. 
Further Results of the Experimental Treatment of Trypanosomiasis 
im Rats; being a Progress Report of a Committee of the 
Royal Socrety.* 
By H. G. Purer, F.LS., and J. D. THOMSON, M.B., C.M. 
(Communicated by Sir Ray Lankester, K.C.B., F.R.S., Chairman of the Tropical 
Diseases Committee. Received October 28,—Read November 7, 1907.) 
[PuaTE 1.] 
The following results are a continuation of the work already described, 
and the experiments have been carried out upon rats inoculated with the 
same strains of N agana and Surra :— 
Condition of the Animals living at the Date of the Completion of the Tables 
an the former Paper. 
Table I.—Nagana Rats treated with Atoxyl and Succinimide of Mercury. 
No. 4 is still living and well 229 days after inoculation. 
” 7  & ” 222 ” ” 
”9 10 ” ” 178 ” ” 
” 15 ” ”? 164 7 89D) ” 
” 21 ” ” 63 Pine 9 
» 6 died on the 214th day after inoculation. 
eit Sara BT 2 cae ig es 
3 8G ae 81st | re 
* This Committee, which planned and supervised the investigations, was appointed by 
the Tropical Diseases Committee for the purposes of this experimental enquiry, and | 
consists of the following members: Professor J. Rose Bradford, Colonel Bruce, Professor t 
Cushny, and Mr. H. G. Plimmer. A preliminary summary of the results of the enquiry — 
VOL. LXXX.—B. B 
