MILLS AND OTHER BUILDINGS 165 



get out. The next story should be handled in the 

 same manner and the room closed. Kach floor below, 

 including the basement, is handled the same way. 

 Whenever the gas is generated in a basement, cellar, 

 or in a room where the operator can not get out 

 quickly without climbing a ladder or going up-stairs, 

 great care should be taken. The lines of string lead- 

 ing from the cyanide should be arranged so they can 

 be cut from a point where the operator will have no 

 difficulty in escaping quickly. Under no circum- 

 stances should one go into a basement or other 

 enclosure, unite the chemicals, and attempt to escape 

 by climbing a ladder or stair. Such a procedure would 

 be exceedingly hazardous and should be avoided. 



Outside doors or other openings in buildings where 

 persons are admitted should be carefully locked or 

 barred, so that no one could possibly enter while the 

 gas is enclosed. 



Airing the enclosure. In buildings where large 

 quantities of grain, manufactured products, or other 

 materials, are stored the gas should be left, where it is 

 convenient to do so, from five to twenty- four hours, or 

 even longer. During this time more or less of the gas 

 will escape, and when the doors or ventilators are opened 

 great care should be taken not to inhale the escaping 

 gas. The building should be left open and allowed 

 to thoroughly air for half an hour or longer before 

 anybody is permitted to enter it. In tight enclosures, 

 such as basements and lower rooms, where free 

 circulation is not available, a longer time may be 

 required to eliminate the gas. In such cases extra 

 precaution should be taken. If there is the slightest 



