In all cases of operations on the teats the instruments must be thoroughly disinfected with hot water, or by dipping in carbolic acid and then in water that has been boiled. OPENING IN THE SIDE OF THE TEAT (MILK FISTULA). This may occur from wounds penetrating the milk duct and failing to close, or it may be congenital, and then very often it leads to a distinct milk duct and an independent portion of the gland. In the first form it is necessary only to dissect away the skin leading into the opening for some distance down, to close the orifice with stitches, and to cover the whole with collodion. A teat tube or spring dilator may be worn to drain the milk off and prevent distention and reopening of the orifice. In case of an independent milk duct and gland one of two courses may be selected--to open the one duct into the other by incision and then close the offending opening, or to inject the superfluous gland through its duct with a caustic solution, so as to destroy its secreting power. In both cases it is desirable to wait until the cow goes dry. * * * * * DISEASES FOLLOWING PARTURITION. DESCRIPTION OF PLATES. PLATES XXII, XXIII. Supports for prolapsed uterus. These illustrations show various appliances used in prolapse or inversion of the uterus. The uterus should first be returned to its proper situation and then some apparatus applied to prevent a recurrence of the inversion or protrusion. PLATE XXII: Fig. 1. Crupper, strap truss. (From Hill's Bovine Medicine and Surgery.) Fig. 2. Renault's rope truss. The rope for this truss should be from 25 to 30 feet long and about the thickness of the little finger. PLATE XXIII: Fig. 1. Cow to which Delwart's rope truss has been applied. Fig. 1_a_ shows the loop of Delwart's truss. Fig. 2. Zundel's labial sutures. These consist of two wires passed through the lips of the vulva in a horizontal direction, and two additional wires passed through the loops at the ends of the horizontal wires in order to hold them in place. Fig. 3. Iron truss for holding the vagina or uterus in place after calving. The cords are passed through the eyes at the corners of the triangular iron; the base of the triangle fits under the tail. The truss is from 5 to 7 inches long and about 2-1/2 inches wide. PLATE XXIV. Instruments used in diseases following parturition. Fig. 1. L¸thi's perforating sound, for opening the milk canal through the teat when this has become occluded; A, the sound one-half the natural size; B, section of head of sound, natural size, showing cutting edge. Fig. 2. Bistouri cachÈ. A blade hidden in its sheath which by pressure of the finger may be made to protrude a certain distance. This distance is regulated by the screw near the handle. The instrument is used to open the milk canal when closed up. It is introduced into the milk canal with its blade in the sheath and withdrawn with the blade protruding.