The old vegetable neurotics. Hemlock, opium, belladonna and henbane. Their physiological action and therapeutical use, alone and in combination. Being the Gulstonian Lectures of 1868, extended and including a complete examination of the active constituent of opium. This book, "The old vegetable neurotics Hemlock, opium, belladonna and henbane," by John Harley, is a replication of a book originally published before 1869. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible.