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FUMIGATION INVESTIGATIONS IN CALIFORNIA. 



the carts equipped for use is shown in figure 23. As purchased the 

 cart bed consists of a plain box fitted with a two-shaft handle. This 

 handle is removed, and is replaced by a tongue having an enlarged 

 link-shaped iron about a foot long, firmly attached at the end. This 

 link-shaped handle is very convenient in field work. The scales for 

 weighing the chemicals are placed on a platform above the center 

 of the box. The cyanid is contained in a tin-lined box in the rear 

 half of the cart, while the acid and water are placed in the front end, 

 A 10-gallon keg firmly attached in a horizontal position to the bed 

 of the cart is a very convenient receptacle for the water. A galva- 



Fig. 23. — Cart used with the improved system ol fumigation. (Original.) 



nized-iron basin like that shown above the keg in figure 23, having an 

 opening at the bottom fitting into the bung of the keg, makes a very 

 satisfactoiy funnel for filling the keg. The acid may be held in an 

 earthenware jar or a lead-lined tank, with cover firmly attached to 

 prevent slopping. 



By way of a cover for the earthenware jar we have used a lead- 

 lined hd, which fits tightly within the top (fig. 24). At the center of 

 this lid is an opening about 6 inches in diameter, around the circum- 

 ference of which is attached a leaden tube which extends downward 

 several inches and prevents the slopping of acid through the hole. 

 A lead-lined cover fits into the top of this tube. This opening in the 

 cover is for use in filling the jar. 



