54 
FUMIGATION INVESTIGATIONS IN CALIFORNIA. 
so as to fit the opening in the drum. The one difficulty with this 
device is that the flow of acid is uneven and spouting. To offset 
this, Mr. William Wood, of Whittier, Cal., has contrived a small 
copper tube for 
attachment to the 
pipe, one end of 
the tube being ex- 
posed to the open 
air, the other end 
extending up above 
the level of the acid 
within the drum, 
thus allowing an 
uninterrupted How 
of air into the latter. This apparatus is illustrated in figure 16. 
A third method in use is to transfer the drums from the wagon to a 
platform 2 or 3 feet high. The acid may then be removed very easily 
by means of a piece of rubber hose employed as a siphon (fig. 17). 
Fig. It 
mproved pipe for removing acid from drums. (Original.) 
Fig. 17.— Siphoning acid from drums by means of a rubber hose. (Original.) 
From carboys. Two common methods used for removing acid 
from carboys in the held are shown in figures 18 and 1!). In the first 
method a small amount of dirt is placed againsl one side of the car- 
