. The Bulletin of the North Carolina Department of Agriculture. Agriculture -- North Carolina. The Bulletin. 69 The acid and water should be mixed together in an earthenware jar of about 5 gallons capacity. Ordinarily, not more than about 10 ounces of potassium cyanide to be used in one jar. If a larger amount than this is required to fumigate the room, it should be separated into 10-ounce or smaller lots. Potassium cyanide, after being weighed out, should be placed in thin cloth sacks. A skilled person in fumigat- ing a large room can drop these sacks into the jars one after another and escap
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. The Bulletin of the North Carolina Department of Agriculture. Agriculture -- North Carolina. The Bulletin. 69 The acid and water should be mixed together in an earthenware jar of about 5 gallons capacity. Ordinarily, not more than about 10 ounces of potassium cyanide to be used in one jar. If a larger amount than this is required to fumigate the room, it should be separated into 10-ounce or smaller lots. Potassium cyanide, after being weighed out, should be placed in thin cloth sacks. A skilled person in fumigat- ing a large room can drop these sacks into the jars one after another and escape from the room without injurious results, but as hydro- cyanic acid gas is one of the most deadly poisons known, it should be used with great care. A better plan would be to have the sacks suspended over the jars by means of cords working through screw- eyes in such a way that the sacks can be lowered into the jars from the outside. The building should then be left closed about 12 hours and then thoroughly aired before any one attempts to enter the building. The building should be made as near air-tight as possible before fumigation is commenced, otherwise enough of the gas may escape into the outside air to be injurious.. Fig. 56.—Drug Store Beetle, (a) Larva; (b) pupa ; (c) adult; (d) adult, side view (all enlarged). (After Chittenden, Bureau of Entomology, U. S. Dept. Agri., Bui. No. 4, n. s.) The Drug Store Beetle.1 (Order Golcoptera.) This insect belongs to the same group as the Cigarette Beetle, which it resembles closely. Like the Cigarette Beetle, it is also a very general feeder on all sorts of dried stored products. It does not seem to be especially fond of tobacco, but has been observed by the writer in Raleigh injuring cigars by eating out the filler, though it was a much more serious pest of other stored products in the same store. This insect resembles very closely the Cigarette Beetle. The more important differences can be noticed at a glance by comparing Figs