A total of 192 cows were examined. They gave a conception rate of 63.0 per cent and included 95 cows suffering from reproductive disorders. These cows received necessary treatment and 49 of them (76.0 per cent) became conceptive when inseminated with frozen semen.
Fifty-seven cows were injected intravenously with HCG for treatment of disorders in the ovarian function and then subje cted to insemination with frozen semen As a result, they exhibited a conception rate of 70.2 per cent.
Four cows remained infertile in spite of insemination with frozen semen when they had undergone uterine irrigation and medication on the following day of insemination or prior to estrus for the treatment of vaginitis and endometritis.

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Swine cysticercosis is widely distributed in China, Okinawa (Ryukyu), Korea, India, and other districts, but it has not been reported to occur in Japan.
Import of live domestic animals from Korea had been prohibited by law until August, 1963, when the prohibition was removed. About 6, 000 pigs were imported curing a period from December, 1963, to September, 1964, and slaughtered at Omiya, Yokohama, Fukuoka, Kobe, and Osaka slaughterhouses. Of 1, 518 pigs slaughtered at the Omiya Slaughterhouse in Saitama Prefecture, 19 were found infested with pork measles.
The results of postmortem inspection are as follows.
1. Swine cysticercosis was found in 1.25%. All the infected pork was condemned.
2. Swine cysticerci were found most frequently in the muscles, but less frequently in the visceral organs.
3. The worm vesicles ranged from 5 to 19 mm in length and from 3.0 to 9.9 mm in width, being most frequently 7 to 12.9 mm and 4 to 7.9 mm, respectively.
4. The number of rostellar hooks varied from 17 to 30, most frequently from 24 to 30. The hooks in odd numbers, though occurring in small numbers, were ascribed to the number of shorter hooks. The longer hooks ranged from 132 to 167 microns in length. The ratio by length of the shorter to the longer hooks varied from 0.60 to 0.84.
5. In the postmortem examination of 4 dogs artificially infected with worm vesicles 2 months before, no adult tapeworms were found.
6. Close postmortem inspection should be made on hogs imported from infected areas, especially of such portions as the tongue, heart, diaphragm, mediastinum, and muscles of head, neck, abdomen, and haunch.

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The sows used were divided into five groups and treated as follows: 3 doses of 2 ml of Ap-purified vaccine at a tissue concentration (TC) of 100% in group A, 3 doses of 2 ml of 1: 20 dilution of the same vaccine (at a TC of 5%) in group B, 3 doses of 2ml of commercial high-titer vaccine at a TC of 10% in group C, 2 doses of 10 ml of commercial ordinary vaccine at a TC of 1% in group D, and no doses in group E as untreated control.
These sows were also classified into four sections. Section I: those in which more than a month of the gestation period had been included in the prevailing period of Japanese encephalitis, or a 3-month period beginning with July. Section II: those which did not fall under this category. Section III: those which were highly suspected of having a history of natural infection in the previous year, since they were proved to have serum antibody before the present inoculation, or they were born earlier than June of the previous year. Section IV: those for which it was highly possible to be free from spontaneous infection, since they were proved to be negative for serum antibody before the present inocula tion, or they were born later than September of the previous year.
I. The rate of stillbirth was higher in section I than in section II.
2. There was no great difference in the rate of stillbirth between sections III and IV in group E (23.7 and 24.7% respectively). This rate was reduced remarkably in section III in groups A, B, and C (0, 0, and 6. 7% respectively). In section IV, however, it showed a significant decrease only in group A (16.2%).

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From sewage water and activated sludge 150 strains of bacteria were isolated. Of them, 10 strains were selected for having an ability both to form zooglea and to remove nitrogen from artificial media. Of the 10 strains, three were tested for removal of ammoniac nitrogen from artificial media. Rubazonic reaction was applied to the quantitative analysis of ammoniac nitrogen.
It was found that about 35 per cent of the ammoniac nitrogen had been removed during a period from 48 to 120 hours.

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