1. I studied the acclimatization phenomena to the tropical climate in Holstein and Berkshire by means of measuring the body temperature, pulse number and respiration number.
2. Under the influence of high temperature in tropical Formosa, the body temperature, pulse number and respiration number of Holstein and Berkshire which are imported from japan are more remarkably increased than Halstein and Berkshire which are born in Formosa.
3. From the above facts we can know that Holstein and Berkshire which are born in Formosa can acclimatize pretty well to the tropical climate in Formosa.