CONTAMINATED AIR 



159 



Examples are metal and stone dust and fine sand, produced in in- 

 dustries in which metals are ground and polished, in which sand-blasts 

 are used, and in which chipping of metal or stone is carried on. 



3. Dust may carry with it disease germs of various kinds. 



Street and house dusts are the most common source of this kind 

 of danger. 



A list of the most common occupations in which the danger 

 from dust is an important factor is given below. It is possible 

 in most of the industries to reduce the dust danger almost to 

 the zero point, 



SOME COMMON OCCUPATIONS IN WHICH DUST IS A SERIOUS 

 MENACE TO THE WORKERS 



Mining 



Crushing of metals and minerals 



Sifting of metals 



Molding and core-making 



Grinding and polishing 



Brass-working 



Tool-making 



File-cutting 



Marble-cutting 



Stone-working 



Glass-working 



Cement-working 



Pottery and earthenware industries 



Plastering and paper-hanging 



Diamond-cutting 



Engraving 



Jewelry-making 



Grain-handling 



Flour industry 



Starch-refining 



Baking and confectionery work 



Tobacco-working 



Cotton textile industry 



Flax and linen industries 



Woolen and worsted manufacture 



Silk industry 



Spinning 



Weaving 



Hosiery and knitting industries 



Lace-making 



Hat-making 



Hemp and cordage industries 



Jute and jute-goods industries 



Shoddy manufacture 



Rag-picking and rag-working 



Wood-turning and wood-carving 



Cabinet-making 



Upholstery and mattress-making 



Brush-making 



Paper-making 



Printing industry 



Lithographing 



Street-cleaning 



In the grinding of paints and of metals it is possible in many cases 

 to use a wet process, in which water or oil is used to hold down the 

 dust particles resulting from the grinding. 



