applied at the time of sowing the seed by means of a suitable copper 

 or galvanized iron tank (see fig. i) attached to a " Planet Junior " 

 or almost any form of onion sower. At the bottom of the tank a 

 block tin tube about a quarter of an inch in diameter is fastened, to 

 which is attached a valve to regulate the flow of the formalin, and as 

 the tube is flexible and at the same time more or less rigid, it can be 

 bent in any position desired, and held securely. The tank is attached 

 to the sower by means of strips of iron ( see fig. i) and holds one 

 gallon. 



The tank is not fastened to the iron frame, but merely sets in it, 



which is sufficient to hold it in place, 

 and it can be easily removed. In figure 

 2, the tank and tube are shown de- 

 tached from the sower. A special fea- 

 ture in the construction of the tank con- 

 sists in its being so made that it will 

 drain easily, the middle of the tank being 

 lower than the ends. A larger tank can 

 be used if necessary, as the weight of the 

 formalin is not enough to affect the easy 

 handling of the machine. The flow of 

 the formalin solution in a tank of this 

 shape is nearly uniform. There is little 

 difference between the amount of the 

 formalin flowing when the tank is full 

 and when nearly empty. 



Tests have shown that about 1200 



feet of drill can be treated with one 



gallon of formalin solution. The flow of 



the solution, which should be sufficient 



to cover the seed and wet the soil around 



I'lG. 2. it to a certain extent, is regulated by 



the valve. An attachment of this sort can be easily made by a local 



plumber and readily fastened to an onion sower. * 



