Miit'-ritils and Their 



chain links, and these eoxers sliouKl he kept closed 

 except when supplies are being witlulrawn. 



l-.mpty boxes, barrels, kegs, and other rubbish 

 should not be allowed to accumulate. Lighted 

 cigar and cigarette stubs, pipe ashes, and matches 

 should never be thrown on or near rubbish piles. 

 or in other dangerous places where they m 

 start a fire. Floors should constantly be swept 

 clean where waste rapidly accumulates. All rub- 

 bish should be collected and disposed of each dav. 



Drip pans should be used to catch the oil drip- 

 pings from machines and so prevent the oil from 

 soaking into the floor. This not only decreases 

 the fire risk, but keeps the floor from becoming 

 slippery. Sawdust or other combustible material 

 should not be used in the drip pans to absorb the 

 oil; sand should be used instead. 



Danger from Dust. Under certain conditions, 

 the dust of many organic substances, such as flour, 

 coal, starch, sugar, rice, meal, grain, and bran, is 

 capable of exploding with tremendous violence. 

 Serious dust explosions have occurred in flour 

 mills, coal mines, and other places, resulting in 

 large loss of life and property. The dust of the 

 above and similar substances is especially danger- 

 ous when suspended in the air in a finely divided 

 state. It may also be ignited when deposited on 

 floors, walls, girders, and machinery; the resulting 

 blaze then generally causes an explosion. Under 

 such conditions, sparks from grinding stones, belts, 

 machinery, and electrical apparatus or open flames 

 should not be permitted. 



