Our knowledge of the toxins is of quite recent date. It is hardly twenty years since we began to acquire a knowledge of the facts that are detailed in this volume, and to which modern medicine owes its most recent and marvelous progress, particularly in serotherapy. In this volume we have studied, besides the true toxins--substances of cellular origin and of albuminoid nature and unknown composition--other toxic substances, the nitrogenized alkaloidal bases introduced into science through the researches of Selmi, Armand Gautier, and von Behring, and which are highly hydrogenized nitrogenous crystallizable principles of definite chemical composition--the products of the more or less advanced…
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