Experiment ^89.- -Six days after its inoculation on January 24ih, nypanKoiies 
appeared in the peripheral blood of an adult female rabbit. Treatment was con- 
menced five days later, and 3*5 c.cm. of five per cent. Atoxyl were given in foo 
doses on four successive days. On the four following days 4 c.cm. of a two pet uot. 
solution of Mercury bichloride was given in four equal doses. In spite of 
careful examination trypanosomes could never be found in the peripheral Wood (i 
the animal, although it steadily lost weight; thus at the time of inoculatiD: it 
weighed lozo grammes, at the commencement of treatment 1850 grammei, aad it 
seventy days after the cessation of treatment lyir grammes. A pappy was ab- 
inoculated at this time but it never became infected. Because of diis less 
of weight a second course of treatment was commenced eighty-two days after 
the stoppage of the first course; 8 c.cm. of Atoxyl was given in three approiimaielv 
equal doses on three successive days and was immediately followed on the two 
next days by two doses, each of 3 c.cm., of a two per cent, solution of bichlMide 
of Mercury. The animal's weight soon commenced to increase, and in sii weeb 
160 grauimes was gained. The animal, unfortunately, died from pneumonia oo 
August 8th, two hundred and seventy days after inoculation. Its blood had betc 
examined almost daily and trypanosomes were never seen, nor were they ever fonini 
in a rabbit and two mice subinoculated with large amounts of blood from it 00 
July 13 th and July 38th respectively. 
Experime.vt 3 QI. — An adult male rabbit was inoculated on January 24*1^^ 
iQoy. After ten days trypanosomes appeared in its blood. Four days later treat¬ 
ment was commenced and 4 c.cm. of five per cent. Atoxylsolution wasgiveninequai 
doses during five days. This was immediately followed on four successive days 
by 4 c.cm., given in four equal doses, of a two per cent, solution of bichloride « 
Mercury. Ihe animal's blood was examined carefully, but trypanosomes were 
never again seen, and the animal was still living on the jrd March, 19(^1 
hundred and three days after inoculation. 
Rats were subinoculated from this animal at fourteen, forty-five, seventy- ve, 
one hundred and six, one hundred and thirty-six, and one hundred and sixty-seven 
days after the cessation of treatment. All of them have been carefully examined 
and none of them have ever been found to be infected. 
Experi.ment 350. — Trypanosomes were first seen in the blood of an a 
emaie rabbit on April 39th, 1907, twenty-five days after its inoculation. Trealn 
was commenced next day, on April 30th, and 10 c.cm. of Atoxyl solution was g 
m our doses during the next seven days; 6 c.cm. were given in the last two dc 
# immediately followed by 4 c.cm. of a two per cent, solution ofbichlo 
^ ^*'cury, given in four equal doses on four successive days. The animal 
still alive on March 3rd. 1908, three hundred and thirty-three days a 
j ^ypanosomes were never seen in its blood, -nor did they ever ap] 
I the blood of rats subinoculated from it on the last day of treatment, anc 
y sig t, eighty-nine, and one hundred and twenty days from that date. 
i •■ypanosomes appeared in the peripheral blood of an 
^^y^ its inoculation. Six days later treatment 
dose f ® per solution of Atoxyl was ?ven m 
follow*.^! repeated seventeen days later, and then was imme 
bichloriHa ^ doses of i c.cm of a two per cent, solution of - e 
animal’^ Ki -successive days. Trypanosomes were not “ 
days lat<.r injection of Atoxyl to its death, 0 ) 
the blonrt autopsy; cause of death unknown), nor were trypanosomes see 
ment f™*" i* thir;y.one days from the commen 
Of five rabbits infected with rrff,a„i,sa„m iruai treatfd bf 
