Dr. McKeen Cattell: The treatment of poisoning in man offers problems to the physician which at times will call on all the resources at his command. In the first place the diagnosis is apt to be difficult, and in addition to the physical signs and symptoms the physician will often need to call on his ability as a detective. Further, the conditions under which treatment must be employed are likely to be difficult. Quick decisions are necessary, often in the midst of a much disturbed atmosphere. Finally, while many of the general principles of treatment are well worked out, many difficulties arise when it comes to the choice of a specific antidote and the amount which shall be administered, and the literature on the subject gives one very little help. It is hoped that during the present session we shall be able to crystallize the more important information regarding drug