The drug culture's quest for the perfect legal high has created a bewildering range of alternatives to marijuanabeyond the reach of the law but sometimes of dubious effectiveness or safety. Psychopharmacologist Ronald K. Siegel, 33, of U.C.L.A.'s School of Medicine reports in the Journal of the American Medical Association that at least 192 herbs are commercially available and used for smoking, either already prepared as cigarettes or sold loose for "roll your own" and pipe addicts. Many are come-ons containing nothing stronger than backyard greenery, but Siegel has found 44% to contain...
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