52 DDT — Killer of Killers 



^ram of DDT per kilogram of body weight per day over a 

 period of 18 days, at the end of which time only one of the 

 three animals showed signs of poisoning. At the same rate, 

 our 150-pound man would have to inhale about 6.8 grams of 

 ^DDT per day, or over Yd pint of a 5 % DDT solution! 

 About the only way he could possibly do this would be to 

 squirt the spray right up his nose; and even then it would be 

 a rather tedious job. If the solution contained only one per 

 cent DDT, our mythical man would have to work much 

 harder— he would have to inhale about a quart of the spray. 

 The rabbit is not a particularly robust beast, but it has 

 been found that when he is exposed to a 1 % DDT-kerosene 

 spray for 48 minutes a day he is still in the best of health 

 after 4 weeks. If 48 minutes a day won't bother a little rab- 

 bit even when you try to make him breathe the stuff, it is 

 very unlikely that you will be affeaed by breathing a little 

 DDT mist for a few minutes a day. No, not even if your 

 spray contains 5 % DDT instead of 1 % ! 



Your Liiy-White Skin 



Your bones and flesh are enclosed, more or less tightly, 

 in a tough, thick membrane which we call the skin. Your 

 usual preoccupation with this portion of your anatomy is 

 principally with such matters as whether it is clean or dirty, 

 whether it is firm and taut or hangs in baggy folds beneath 

 your jaw bone and under your eyes, or whether it is freckled, 

 pimply, full of blackheads, or needs a shave. Yet your skin 

 — even if it is the type that no one loves to touch — is a very 

 complicated mechanism that has many things to do. It 

 holds the rest of you together; on hot days it lowers your 

 body temperature by discharging perspiration to the body sur- 



