six chin, or Japanese spaniel, dogs of the same family line 1-4 years old belonging to three consecutive generations were examined ophthalmologically. All of them were affected with cataract of both eyes. The persistent arteria hyaloidea was seen in 3 eyes of 2 dogs of the second generation. Total ablatio retinae was observed in 3 eyes of 2 dogs of the second generation. Generalized progressive retinal atrophy was noticed in 9 eyes of 5 dogs It was interpreted that cataract and generalized progressive retinal atrophy might have appeared as dominant hereditary characters in most of the dogs studied and were complicated with the persistent arteria hyaloidea in some dogs, and that all the dogs involved might have belonged to a family line rarely encountered.
A single daily dose of 400 or 800 mg of ampicillin, synthetic penicillin, in tablet, from was added to substitute milk and administered to 31 suckling calves weighing about 70kg for 2-5 days. On the other hand, a single daily dose of 8 or 16 mlof oil containing 50 mg/mlof ampicillin was administered to 30 similar calves in the same manner. All the calves had been proved clinically or bacteriologically to be affected with microbial diarrhea. As a result, the calves given tablets showed a recovery rate of 96.8%, and those given the oil a rate of 90%. No side-effects of ampicillin were observed in any calf. Six strains ofEscherichia coliand 2 Salmonella strains were sensitive to ampicillin when tested.
In 1973, eighty-one milkers used by dairy farmers were chcked on their function. The negative pressure inside of the milker was examined by an air flow meter and the frequency and ratio of pulsation by a pulsator recorder. As a result, fifty-three milkers (65.4%) had some functional failures. In general, the longer a milker was used, the less efficiently it worked. Few users were aware of a decrease in the function of their miklers. The functional failure of the milker deteriorated the quality of milk, as well as the efficiency of mikling, and decreased milk yields. After it was removed, milk positive for CMT decreasedinquantity, milkyieldsincreased (22-27%), the incidence of mastitis decreased, and the milking time was curtailed by 33%.