114 FUMIGATION METHODS 
placed in the jar, and the potassium cyanide in pan 
above, and the plank pushed down a slight incline, as 
seen in the figure, over which a cleat, g, is fastened, 
which catches the wire or rod, f, and thus dumps the 
pan, é, throwing the contents into the jar, a, there- 
by completing the mixture and generating the gas; 
and, as a drop-door closes as soon as the plank is 
4 
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e 
: 
a 
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- GENCRATOR 
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FIG. 68 —LOWER PORTION OF FUMIGATORIUM, SHOWING SLAT 
FLOOR, IN CROSS-SECTION, AND GENERATING APPARATUS 
(AFTER SANDERSON) 
pushed down the incline, there is no chance of the 
operator breathing the fumes. The arrangement is 
simple, and any one at all handy with tools can easily 
construct the whole apparatus. 
The Delaware method.—As a result of the splendid 
work of Professors Sanderson and Penny, of the 
Delaware Experiment Station, many obscure points 
about the diffusion of the gas have been cleared 
up. Their experiments point to the utility of a slat 
floor. Asa modification of the ordinary slat floor, to 
