13 
8. If one must deal with returned sacks they should be fumigated 
before l:»eiug placed iu mill, as they are a prolific source of infestation. 
9. Use four-gallon jars, never three or five, if it is avoidable. 
Three-gallon crocks frequently boil over, and five-gallon crocks are 
unnecessarily large and expensive. 
10. For his own satisfaction in doing the work thoroughly, and 
for the safety of his employes, no miller should undertake this opera- 
tion without having first beconie conversant with every step of the 
process. 
11. Hydrocyanic acid gas penetrates readily through small cracks 
and crevices. A mill in close juxtaposition with another building not 
controlled by the miller, or within ten or twelve feet of another building 
occupied during the process, would present difficulties. 
12. Although this gas is not explosive at the strength above rec- 
ommended, it would appear to be a desirable precaution to turn oft* 
lights and draw fires (if the boiler or engine room are included or are 
reached by the gas) before the operation. 
13. In ordering material get more than enough, for if one finds 
himself short at the last moment, and is at a distance from the source 
of supplies, he certainly is in a predicament. Further, order in time. 
Railroad companies will not ordinarily freight acid in carboys with 
general merchandise ; they may hold the acid several days or a week, 
waiting for an oil car. 
