VI. Contributions to our knowledge of the connexion between chemical constitution, physiological action, and antagonism

This paper is divided into several parts. In th e first the authors consider the general action of ammonium salts, and show th at the action of the ammonium is considerably modified by the acid radical with which it is combined. All the ammonium salts affect the spinal cord, motor nerves, and muscles, and in advanced poisoning tend to poison all those structures. The course of poisoning varies with the salt employed. The chloride, bromide, and iodide form a series in which a stim ulant action on the cord is best m arked in the bromide, and the paralysing action upon it and upon motor nerves most strongly in the iodide.