64                               SURRA.

Trypanosomes reappeared 12 days after last dose. The
animal was then put on treatment with atoxyl and arsenic
in alternate doses.

1st day 60 c.c. atoxyl.

11th day 2 gms. ars. ac.

3rd „ 1.5 gms. ars. ac.

13th „ 60 c.c. atoxyl.

5th „ 60 c.c. atoxyl.

15th „ 2 gms. ars. ac.

7th „ 1.5 gms. ars. ac.

17th „ 60 c.c. atoxyl.

9th „ 60 c.c. atoxyl.

19th „ 2 gms. ars. ac.

No return of trypanosomes. Kept under observation
3 months.

Pony C. 62.—580 lbs.

1st day 600 c.c. ars. ac. sol.

2nd „ 60 c.c. atoxyl.

3rd „ 1.5 gms. ars. ac.

The pony showed symptoms of poisoning after last dose.
Treatment was suspended for three weeks. A relapse
occurred, and the animal was then treated with atoxyl and
arsenic in alternate doses.

1st day 60 c.c. atoxyl.

11th day 2 gms. ars. ac.

3rd „ 1 gm. ars. ac.

13th „ 60 c.c. atoxyl.

5th „ 60 c.c. atoxyl.

15th „ 2 gms. ars. ac.

7th „ 1.5 gms. ars. ac.

17th „ 60 c.c. atoxyl.

9th „ 60 c.c. atoxyl.

19th „ 2 gms. ars. ac.

No return of trypanosomes. Kept under observation
3 months.

Pony C. 63.—500 lbs.

1st day 600 c.c. ars. ac. sol.

Four days interval.

2nd „ 60 c.c. atoxyl.

8th day 700 c.c. ars. ac. sol.

3rd ., 1 gm. ars. ac.

9th „ 60 c.c. atoxyl.

The pony showed symptoms of poisoning. Treatment
was suspended for three weeks. No relapse occurred in that
time. Treatment was then changed to atoxyl and arsenic in
alternate doses.

1st day 60 c.c. atoxyl.

11th day 1.5 gms. ars. ac.

3rd „ 1 gm. ars. ac.

13th „ 60 c.c. atoxyl.

5th „ 60 c.c. atoxyl.

15th „ 1.5 gms. ars. ac.

7th „ 1.5 gms. ars. ac.

17th ... 60 c.c. atoxyl.

9th „ 60 c.c. atoxyl.

19th „ 2 gms. ars. ac.

No return of trypanosomes. Kept under observation
3 months.