On the Connection between Chemical Constitution and Physiological Action:—On the Physiological Action of the Salts of Ammonia, of Tri-niethylamine, and of Tetramethyl-ammonium; of the Salts of Tropia, and of the Ammonium Bases derived from it; and of Tropic, Atropic, and Isatropic Acids and their Salts. With further details on the Physiological Action of the Salts of Methyl-Strychnium and of Ethyl-Strychnium.