The Dust Hazard in Certain Industries

Abstract

PHILADELPHIANo health hazard in industry has attracted so much attention, and rightly so, as dust, and yet few exact studies on its nature and quantitative features have appeared. It is not enough to know only that dust has an influence on health, or even what the resultant pathologic conditions are; it must also be shown how these effects are brought about. In order to approach this problem intelligently, it is of prime importance to appreciate certain things about dust itself, and in this communication are presented briefly the results of investigations on the dusts of various industries. These show the number of particles per unit volume of air and their approximate size, the weight