It has been asserted that scarlet fever has been transmitted from the cow to man, and it can not be denied that in many cases the infection has been spread by means of the milk. The facts, however, when brought out fully have shown that in almost every case the milk had first come into contact with a person suffering or recovering from scarlet fever, so that the milk was infected after it left the cow. The alleged exceptional cases at Hendon and Dover, England, are not conclusive. In the Hendon outbreak inoculations were made on calves from the slight eruption on the cow's teats, and they had a slight eruption on the lips and a form of inflammation of the kidneys, which Dr. Klein thought resembled that of scarlatina. The cows that had brought the disease to the Hendon dairies were traced back to Wiltshire, where cows were found suffering from a similar malady, but no sign of scarlet fever resulted. In the Dover outbreak the dairyman first denied any disease in his cows, and brought a certificate of a veterinarian to prove that they were sound at the time of the investigation; then later he confessed that the cows had had foot-and-mouth disease some time before, and consequent eruption on the teats. So the question remains whether the man who denied sickness in the cows to begin with, and adduced professional evidence of it, did not later acknowledge the foot-and-mouth disease as a blind to hide the real source of the trouble in scarlatina in his own family or in the family of an employee. In America Dr. Stickler said that he had produced scarlatina in children by inoculation with imported virus of foot-and-mouth disease, but his contention is negatived by the facts that with foot-and-mouth disease constantly present in Europe scarlatina does not accompany it, and that in America, with scarlatina constantly prevailing at some point, foot-and-mouth disease is unknown locally except at long intervals and as the result of the importation of infected animals or their products. Man is susceptible to foot-and-mouth disease, but it never appears during the frequent epidemics of scarlatina. Among other contagious forms of mammitis I may name one which I have encountered in large dairies, starting as a sore and slight swelling at the opening of the teat and extending up along the milk duct to the gland structure in the bag, all of which become indurated, nodular, and painful. The milk is entirely suppressed in that quarter of the bag, and from that it may extend to the others as it does from cow to cow through the milker's hands.