Fumigation investigations in California . alperiod of any during which fumigation is conducted. From the foregoing, it is evident that heavy dosage can not beused while the fruits are small without more or less injury, and thatthe most critical period during which fumigation may he conductedis between the time when the fruits are set and the time when theyattain the size of a walnut. HANDLING THE ACID. 53 SIMPLE METHOD OF REMOVING ACID FBOM DRUMS AND CARBOYS. The writer has ai times been obliged to employ rather awkwardmethods in drawing acid from drums and carboys, and other fumi-gators have
Fumigation investigations in California . alperiod of any during which fumigation is conducted. From the foregoing, it is evident that heavy dosage can not beused while the fruits are small without more or less injury, and thatthe most critical period during which fumigation may he conductedis between the time when the fruits are set and the time when theyattain the size of a walnut. HANDLING THE ACID. 53 SIMPLE METHOD OF REMOVING ACID FBOM DRUMS AND CARBOYS. The writer has ai times been obliged to employ rather awkwardmethods in drawing acid from drums and carboys, and other fumi-gators have doubtless met with the same trouble under like circum-stances. Brief mention will he made of some of the best methodswhich have been brought to notice to obviate this difficulty. From drum*. The best method of taking acid from drums known to the writer is that at present in use in San Bernardino County andis .shown in figure 15. The apparatus consists of a, lead-lined tank large enough to hold a. drum of acid and having an outlet through. FlO. 15.—Lead-lined tank used in San Bernardino County for removing sulphuric acid from drums and for filling jugs. (Original.) which the acid may be drawn into carboys, jugs, or whatever vesselsare preferred for field use. A drum of acid is rolled from the wagonupon two parallel beams and along these beams onto a small turn-table at the tank. This turntable is thenTevolved through a quartercircle, permitting the drum to be rolled out over the lead-lined tank,into which the acid is then allowed to How. The acid may be drawnas previously mentioned. The outlet is made of lead tubing, fittedat the tank end with a lead valve by which the (low is regulated. Another w\y satisfactory way of drawing acid from drums cameto the writers attention in examining some operations at Glendale,Cal. It consists in the use of a short iron pipe threaded at one end 54 FUMIGATION INVESTIGATIONS IN CALIFORNIA. so as to fit the opening in the drum. The one difficult
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