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,/, and thus dumps the 

 pan, e, throwing the contents into the jar, a t there- 

 by completing the mixture and generating the gas; 

 and, as a drop-door closes as soon as the plank is 



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. As a modification of the ordinary slat floor, to 



