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16                                      Surra.

Body weight.

April 13th

... 50 c.c. of 4% Atoxyl Tryps. absent.

553 lbs.

„ 15th

... 0.5 gms of Orp. „ „

553 „

„ 17th

... 50 c.c of 4% Atoxyl „ „

553 „

„ 10th

... 0.5 gms. of Orp. „ „

553 „

„ 21st

... 50 c.c. of 4% Atoxyl „ „

553 „

„ 23rd

... 0.5 gms. of Orp. „ „

545 „

„ 25th

... 50 c.c. of 4% Atoxyl „ „

545 „

„ 27th

... 0.5 gms. of Orp. „ „

545 „

„ 29th

... 50 c.c. of 4% Atoxyl „ „

556 „

„ 31st

... 0.5 gms. of Orp. „ „

554 „

May 13th

... ... „ reappeared

...

This pony was very old (about 20 years) and in poor con-
dition. As this was the first of our animals treated with orpi-
ment, a very small dose of this drug was administered, and it
is probable that the quantity was not sufficient to exert a cura-
tive effect.

Pony 260 which was half the weight of this animal,
received the same amount of atoxyl and orpiment with good
result.

                                    PONY 255.

March 30th

... Inoculated with Surra.

April 9th

... ...

Tryps. appeared in blood.

„ 13th to

Treated with Atoxyl
and Tartar Emetic.

28th

May 1st

... ...

Tryps. appeared.

This treatment was unsuccessful. The atoxyl and orp.
method commenced on 8th May.

Body weight
in lbs.

May 8th

... 50 c.c. of 4% Atoxyl Tryps. absent.

615

„ 10th

... 0.5 gms. Orp. „ present (few)

620

„ 11th

... 50 c.c. of 4% Atoxyl „ „

620

„ 12th

... 100 c.c. of 4% Atoxyl „ „

620

„ 14th

... 2 gms. of Orp. „ absent.

620

„ 16th

... 50 c.c. of 4% Atoxyl „ „

630

„ 18th

... 2 gms. of Orp. „ „

630

„ 20th

... 50 c.c. of 4% Atoxyl „ „

638

„ 22nd

.. 2 gms. of Orp. „ „

638

„ 24th

... 2 gms. of Orp. „ „

640

June 21st

... ... „ reappeared

...

This pony was old and in poor condition. He had been
previously treated with atoxyl and tartar emetic without suc-
cess, and at the time the atoxyl and orpiment treatment was
commenced he was in a very advanced stage of Surra.

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