While the effect that the various preparations produce probably does not vary to a great extent, the ability to exert this effect does vary in the different preparations. Because of certain physical properties with which the vehicle carrying the iodine is endowed, certain preparations of iodine are more active in a given condition than others. Others, again, hold the iodine in such a manner that it is more readily available for the needs of the case under treatment, while yet another preparation may hold, within its pharmaceutical dress, greater quantities of available iodine than one very closely allied to it in every other regard. Then, too, it is not always the particular form or preparation that influences the effect; frequently this influence is, for the most part, in the pathological condition itself. Without going into the details of what must be especially considered in the selection of the preparation to be used in a given pathological condition, I have here set down the observations that I have made, in my own practice, and which my experience with this branch of veterinary practice has indicated to me as being as nearly correct as could be expected in a practical way. TINCTURE OF IODINE. Skin disinfection in Surgery. Skin disinfection previous to hypodermic injections. Adjunctive to systemic medication in the treatment of generalized infections with local manifestations, such as septicemia, actinomycosis, acute glandular swellings as a complication to fevers, parotitis, and distemper. First aid application for sprains of ligaments, tendons, and bursae. First aid application in puncture wounds, and wounds in the region of the hoof, articulations, and bone bruises and contusions. Injection into abscess cavities after the liberation of their contents by surgical means. Moist parasitic skin diseases. As an adjunctive in all conditions of an acute character in which it is desired to enhance the action of systemic medication aimed at the correction of local manifestations. For the rapid absorption of acute swellings, such as sternal cysts, cysts in the fleshy parts from kicks or bruises. As an injection into the synovial sack of enlarged bursae, after the contents have been drawn off. OINTMENT OF IODINE. Chronic enlargements of the articulations. Chronic enlargements of osseous structures. Chronic tumefactions resulting from specific infection. Chronic thickening of tendons. Chronic thickening of ligaments. Chronic thickening of localized areas in the skin. Inoperable superficial tumors, when non-septic. Tumefactions accompanying chronic degenerative processes, such as fistulae, deep sinuses, and ulcers. For the absorption of old scar tissue. As a hoof dressing. Parasitic skin diseases. Herpes tonsurans. As a packing for abscess cavities, fistulae and sinuses. Mammitis. Orchitis. Chronic arthritis, spavin, ringbone. Side-bone lameness.