A mare, that is in a condition as described above, is very apt to communicate to the horse covering her, the disease of Gonorrhœa, or Clap, especially if such horse be permitted to cover from five, twelve and fifteen mares a day, where another horse, covering only once every few days will escape unharmed. The reason of this is evident; the penis of the one covering so many mares, becomes very tender and almost transparent, so as almost to cause the blood to shine through it.

Another instance in which a horse is apt to become diseased, is, when he is suffered to cover a mare on the ninth day after she has undergone the process of foaling. At this period there is still a discharge of bloody matter, which is very apt to generate clap in an animal of the opposite sex.

Complete Treatise on the mare and foal at the time of delivery, with illustrations. — Part 11

Sometimes there will appear on the penis of the Stallion, small white blotches, on the surface of the skin, from the size of a pin’s head to that of a grain of wheat, which, on the following day will be double in size. On the third or fourth day, a pea might be set in the ulcers, which will emit an offensive odor, and which will spread with great rapidity.

Complete Treatise on the mare and foal at the time of delivery, with illustrations. — Part 11

In the mare blotches will appear on the shape, of a deep red color, apparently eaten through the surface of the skin, which will enlarge very rapidly. In a day or two, small tumors will appear, extending from the shape in a downward direction to the hams. These tumors are of different sizes, varying from that of a pea to that of a half gallon crock. They are of a very virulent nature, very often causing a painful rawness in the entrance to the womb, and extending from one to one and a half inches.

Complete Treatise on the mare and foal at the time of delivery, with illustrations. — Part 11

The Stallion should be brought out to a fence, and a mare should be placed on the other side of the fence, distant about one rod. This will cause the Stallion to present his penis. A clean crock should be in readiness, containing two ounces of chloride of lime, and two quarts of lukewarm water. There should also be on hand a teacup, containing a stem of nitrate of silver one fourth of an inch in length, which should be pulverized and dissolved in tablespoonful of water. Another teacup should be at hand, containing one teaspoonful of tincture of myrrh.

In the crock there should be a sponge the size of an ordinary apple, with a small stick tied to it. Each of the cups should be provided with a small pencil, made of soft muslin, about the size of a quill.