36 



styles of small engines suitable for this purpose, but the writer is 

 of the opinion that gasoline engines are the most economical 

 as well as being cleaner and more easily attended. City 

 Forester Gale of Springfield, informs me that the gasolene engine 

 used by him in spraying is operated at a cost for fuel of one cent 

 per hour. The pump should supply at least two lines of hose and 

 should have a release valve or " blow-off" to save strain on lines 

 of hose temporarily out of use. The tank should be cylindrical 

 with adjustable hoops so that shrinking of the staves may be taken 

 up. Square or rectangular tanks are much less durable than 

 cylindrical ones. 



Fig. 2. Spraying outfit used in operations against the gypsy moth. From Forbush, 

 Kept. Mass. Bd. of Agri., 189S. 



* 



Several large hand outfits may be substituted for a power 

 sprayer, and when this is desirable an outfit similar to those used 

 by the gypsy moth committee is recommended. This is composed 

 of a 100-gallon tank mounted in a two- wheeled truck and contain- 

 ing a powerful pump placed within the tank (Fig. 2). 



A smaller spraying outfit may be prepared by mounting a suit- 

 able pump on a barrel or cask, the whole being fastened in a 

 wagon or cart. Among other pumps used for this purpose the 

 " Deming" pump is perhaps as satisfactory as any. 



