Industrial Dermatitis

This communication forms only a small part of the present symposium on occupational dermatoses. We therefore assume that our exposition need not (and indeed cannot) be considered alone but is to be regarded as forming an integral part of the entire presentation. For this reason we may here deal with specific isolated points and enter directly into their discussion without preamble. However, the first portion of this paper attempts to fulfil a function which is so fundamental and so necessary that it might well have been considered as an essential preface to the entire program. Definitions, difficult and dry and disagreeable as they may be, are nevertheless an unavoidable necessity for intelligent discussion, and on close analysis one finds that many so-called scientific discussions are, unfortunately, based more on arguments as to definitions than on deliberations as to facts. DEFINITIONS We believe that no one will quarrel with the following