12
50. Experiments were carried out with Carbolic Acid, Sodium Bicar-
bonate, Potassium permanganate and Borax, but no good result were obtained
from any of these drugs.
61. Experiments have been started with chinosol and mercury per-
chloride, but these are not yet complete.
52. Anti-fly emulsions experiments.—It is well known that surra is
spread from camel to camel by means of blood-sucking flies, and if healthy
camels have to pass through an area where surra is known to exist and
blood-sucking flies are prevalent, the chances of healthy camels marching
through the area without contracting the disease are very remote. If, however,
the healthy camels can be protected against the attacks of these blood-sucking
flies, they would be able to march through the area without fear of contracting
the disease. With this view it was decided to carry out some experiments
with different emulsions with the object of determining whether any emulsion
could be found that could be sprayed on camels to ward off the attacks of
the blood-sucking flies,
Emulsions of —
Kerosine oil,
Chirpine oil,
Taramira oil,
Asafo3tida solution,
and an anti-fly emulsion recommended by a member of the Forest Department
were tried.
Six camels were used in the experiments, four being sprayed with the
emulsions and two acting as controls. One control was kept 50 yards away
from the other camels and the other control was kept in the centre of the
sprayed camels, each of these being tied about five yards distant from one
another, all close to a permanent pond in a rakh.
No. 1
Sprayed
Sprayed
No. 2
Sprayed
Sprayed
control.
camel.
camel.
control.
camel.
camel.
The emulsions were made by dissolving soap in water, slowly adding
the drug, stirring briskly the whole time. The emulsion was applied to the
camel by means of a spray pump.
These experiments are only preliminary, and further experiments, will be
carried out.
No. 1
control.
Sprayed
camel.
Sprayed
camel.
No. 2
control.
Sprayed
camel.
Sprayed
camel.
The emulsions were made by dissolving soap in water, slowly adding
the drug, stirring briskly the whole time. The emulsion was applied to the
camel by means of a spray pump.
These experiments are only preliminary, and further experiments will be
carried out.
EXPERIMENT I.—KEROSINE OIL EMULSION.
Soap,
1lb.
Keroaine oil.
20 oz.
Water.
1 gallon.
Amount sprayed an camel.
2 pints.
Before the emulsion was sprayed on to the camels stomoxys were
naimerous on all the camels. Each camel except the two control camels was
sprayed with two pints of the emulsion. At the time of spraying the camels,
the stomoxys at once left the. camels, but reappeared on the camels 25 minutes
after the application of the emulsion.
Tabanidæ appeared on the sprayed camels about three hours after they
were sprayed. They appeared at the same time on the two control camels,
Result,—Stomoxys were only kept off for 25 minutes. Tabanidæ
appeared on the sprayed camels and controls at the same time; this emulsion
did not prevent Tabanidæ biting three hours after the application.
EXPERIMENT II.—KEROSINE OIL EMULSION.
Soap.
11b.
Kerosine oil,
20 oz.
Water.
1 gallon.
Amount sprayed on each samel.
3 pints.
The amount of the emulsion applied was increased by one pint,
each camel receiving three pints. The increased amount sprayed on gave