Survey of the hazards of the chemical age.

The first part of this report is devoted to recalling some very general concepts— indispensable for the understanding of the problems involved: 1. Concerning the different kinds of toxicity, acute, subacute, short term and long term, with special consideration of the consequences, mostly very insidious, of repeated exposure to poisons with cumulative properties. 2. Concerning the processes of absorption of potentially toxic products. 3. Concerning the principal factors inherent in the nature of the subjects exposed or of the environment, which are liable, qualitatively or quantitatively, to have an effect on the toxicity and the ways in which it manifests