54 



FUMIGATION INVESTIGATIONS IN CALIFORNIA. 



SO as to fit the opening in the drum. The one difficuky with this 

 device is that the flow of acid is uneven and spouting. To offset 

 this, Mr. Wilham 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 flow 

 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. 16. — An improved pipe for removing acid from drums. (Original.) 



Fic.i. 17.— .Siphoning acid from drums by means of a rubber liose. (Original.) 



From carhoys. — Two common methods used for removing acid 

 from carboys in the field are shown in figures 18 and 19. In the first 

 method a small amount of dirt is placed against one side of the car- 



