J. D. E. Holmes 
89 
Pony no. IS. 250 lbs., 2nd paroxysm. 15th day of disease. Four doses of arsenious 
acid were given at intervals of four days. 
1st day 1 gm. ars. ae. 11th day 1 gm. ars. ac. 
6th „ 1 „ 16th „ 1 
Trypanosomes reappeared 18 days after last dose. 
Pony no. 79. 300 lbs., 2nd paroxysm. 12th day of disease. Four doses of arsenious 
acid were given at intervals of one day. 
1st day 1 gm. ars. ac. 5th day 1 gm. ars. ac. 
3rd „ 1 „ 7th „ 1 „ 
Trypanosomes reappeared 21 days after last dose. 
Preventive treatment. 
Pony no. 80. 400 lbs. 
1st day 1 gm. ars. ac. 
4th „ 1 
After four days’ interval was inoculated with surra. Trypanosomes 
appeared eight days after the inoculation. 
Pony no. 81. 280 lbs. 
1st day 50 c.c. of 4 °/ 0 atoxyl. 
3rd ,, 1'5 gms. ars. ac. 
After seven days’ interval was inoculated with surra. Trypanosomes 
appeared six days after the inoculation. 
Pony no. 82. 270 lbs. 
1st day 1 gm. ars. ac. 
6th 
0'5 gm. ars. ac. 
7th 
ff 
inoculated with surra. 
10th 
ff 
0-5 gm. ars. ac. 
15th 
ff 
inoculated with surra. 
Trypanosomes appeared on 17th day. 
Pony no. 83. 230 lbs. Treated as Pony no. 81. 
Trypanosomes appeared 9th day. 
Pony no. 34. 300 lbs. Treated as Pony no. 82. 
Trypanosomes appeared 12th day. 
Mule no. 85. 450 lbs. 1st day received intravenously 100 c.c. arsenious acid in 
solution (1 in 1000). 5th day was inoculated with surra. 
11th day trypanosomes appeared in the circulation. 
Mule no. 86. 500 lbs. 1st day 3 gms. arsenious acid dissolved in glycerine. 4th day 
was inoculated with surra. 
12th day trypanosomes appeared in the circulation. 
