March, 1954]                                    S. DATTA                                      3

European-graded animals and buffaloes in various parts of the country as well as
sheep and goats. Their distribution is given in Table I.

                 TABLE I

    Distribution of vaccinated animals

The vaccine has been found to be absolutely safe for animals of all ages, including
those in advanced pregnancy without a single mishap. No reduction in milk yield
has been noticed on any of the farms where vaccinations have been carried out on
a fairly large scale.

Immunity tests

Immunity tests have been carried out in the laboratory on hill cattle as well
as those belonging to the experimental dairy and the herds at Mukteswar and Izat-
nagar by challenge with virulent virus and the results are summarised in Table II.

                                TABLE II

                    Results of immunity tests