60 
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 i- a very convenient receptacle for the water. A galva- 
Fig. 23.— Cart used with the improved system of 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. make- a very 
satisfactory 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 lid. 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 extend- downward 
several inches and prevents the slopping of acid through the hole. 
A lead-lined cover lit- into the top of this tube. This opening in the 
er is for use in filling the jar. 
