A sort of ""Now It Can Be Told"" -- the last word of The Truth About Food and Drugs. Less sensational -- less crammed with unsubstantiated, but controversial, statements -- but none the less a substantial covering of the revelations investigation has made in the lurking dangers to the consumer of drugs, cosmetics, canned and packaged foods, fruit and vegetables. Taken as a whole, it affords an eloquent plea for tightening up the provisions of the emasculated form of the so-called Tugwell Bill, in order to provide adequate protection. Many familiar products are openly discussed and condemned. Others may seem remote from everyday experience. But the story is the same.