282 Western Lave-stock Management 
With the impregnating syringe, the operator allows 
the stallion to serve in the normal manner, then uses a 
syringe to go into the vagina, or if the semen has been 
injected into the uterus proper, to go into the uterus 
and collect the semen by means of the syringe. The 
type of syringe shown in Fig. 30 is now being very success- 
fully used in obtaining the semen either from the uterus 
or from the vagina. After withdrawing the semen, the 
operator may proceed 
directly to the other 
mares, insert the end of 
the syringe into the 
uterus of the mare, and 
deposit some of the fluid, or he may fill capsules from the 
fluid and insert capsules into the other mares. In these 
cases it is necessary to have a vessel of water from 95° 
to 101° temperature, so that the syringe and semen may 
be held at a constant temperature, and also that the 
instruments and materials be kept out of the direct sun- 
light. Sanitary precautions are also absolutely necessary, 
as the spermatozoa are very delicate, and have to be 
handled with every degree of care. 
With the capsule system of breeding, the stallion is 
allowed to serve one mare in the usual manner; the 
operator then takes a gelatine capsule in the hollow 
of his hand, inserts his hand into the vagina and 
scoops the capsule full of semen. He then withdraws 
his arm carefully, holding the capsule in the hollow of 
his hand to protect from light, and holding his finger over 
the opening to prevent the loss of fluid. He immediately 
goes to another mare and inserts his hand and the capsule 
into the vagina, and pushes the capsule carefully on 
into the uterus. This operation is very successful if the 
Fic. 30. — Impregnator Syringe. 
