Abstract
The role of the skin of cattle in heat toleration has exercised many and has produced almost as manyopinions as workers. Brody (1945) pointed out that tropical cattle had a considerably larger surface area than the temperate breeds due to the looseness and folding of the skin. Bonsma, van Marle & Hofmeyr (1953) suggested on the basis of work on the Africander that a thick skin was necessary, presumably to repel the heat rays. Other workers have laid stress upon hair colour and thickness of coat, together with skin pigmentation. Worstell & Brody (1953) considered that cattle do not sweat, but Dowling (1955 a, b) found evidence that they did.

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