Here is your guide to drug abuse. They're all here: mescaline, pentobarbital, cocaine, marihuana [sic]. The information includes slang names, which is my favorite part. I like it that slang terms for alcohol are included, just in case you didn't know what "booze" is. I also like it that amphetamines are sometimes referred to as "co-pilots".
This garish, almost psychedelic wheel is 8 inches across and in good shape. The 1969 copyright belongs to Spenco Corp. of Waco, which now produces insoles, shoes and foot care products. Perhaps they gave up on the War on Drugs. One assumes that Dr. W. R. Spence is the "Spenc" of Spenco.