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Show should enable you to loll in the I sun, without painful after effects, several times as long as you'd dare with an unprotected skin." Brooks explains that suntan preparations were tested by the practical and positive method of trying them no human skin. "We didn't do this on a beach," he declares. "We did it in a laboratory." The shoulders of our subjects were covered with a mask slotted to expose several narrow strips of white, tender skin. The sun-tan preparation being be-ing investigated was applied to every other strip. "Then the unprotected and protected pro-tected strips of skin were exposed for varying lengths of time to the burning rays of a laboratory device de-vice that, for the sake of simplification, simplifi-cation, might be called a scientific sun lamp. Both the intensity of the rays and the time exposure were carefully controlled, so that results could be judged accurately by comparing the erythema (reddening) (red-dening) of the protected and unprotected un-protected areas." Scientific Tests Show Sun-Tan Lotion Merits Scientific tests made of sun-tan oils and creams show they will afford some degree of protection against the burning rays of the sun, but it is impossible to determine deter-mine exactly how much. The tests were- made in the laboratories of Good Housekeeping magazine to ascertain how much protection a sun-tan oil or cream should give. "We can't say definitely," Christopher Brooks states in an article in the August issue of Good Housekeeping magazine. "It all depends on the toughness or tenderness ten-derness of ybur particular skiri. A good oil or cream, however, |