Abstract
AN experiment was carried out on the College farm at Giza to study the heat tolerance of buffaloes and Egyptian, shorthorn and Jersey cows. A total of 107 females of different ages was used for a period of ten months, from November 1949 until August 1950. Body-temperature, respiration-rate and pulse-rate were recorded twice weekly. On each occasion six readings were taken at three-hour intervals starting at 6 a.m. The animals were grouped according to their age and then subdivided according to their breed. The average monthly air temperature ranged from 10.9° C. in January to 27.8° C. in July, and that of relative humidity from 49 per cent in May to 83 per cent in November.
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