SWEAT

is alvays being poured out from the pores of the skin. Asa rule, it dries as fast as it appears, and so we are unconscious of it. Perspiration of this Kind has been called “insensible perspiration,” as opposed to “ sensible perl as or sweating that is sufficient to be visible. ormally, perspiration is only sufficient to be visible when the body is heated. The sweat in drying chills the body and thus checks the rise of temp or at ure that would otherwise occur. Sweat is Gemantaal) mainly of water, but it contains some waste products and fatty matter that readily turn sour. When the kidneys are out of order or overworked, the waste products are discharged in the sweat to an increased extent. Absence of the sweat glands is met with in some people from birth. Such people find a hot room unbearable, and are unfit for life in the tropics. Wide variations occur in different individuals, compatible with health, in the amount of sweat discharged under similar conditions; but in diabetes and many fevers the amount is insufficient. More common is [s. 414]