6 CONTEXTS. 
General considerations — Continued. page. 
Simple method of removing acid from drums and carboys 53 
The protection of cyanid 55 
Hydrocyanic-acid gas in drums 55 
The marking of touts 55 
A device for covering fumigation generators 56 
An improved system of fumigation 
Supply carl 59 
Procedure 61 
Advantages under this system 63 
I >i eage schedule 64 
The improved system in use 
Fumigation simplified 68 
Index G9 
