94 



THE FOREST TENT CATERPILLAR 



five ounces of Paris green and a pint 

 or two of fresh lime-water — made 

 by slaking lime in water — to a bar- 

 rel holding forty or fifty gallons of 

 water. This is thoroughly mixed 

 and sprayed upon the trees by means 

 of a force pump and spray nozzle. 

 In Fig. 33 a simple and eftective 

 spraying outfit is represented. It 

 consists of a kerosene barrel holding 

 fifty gallons, a force pump having a 

 double discharge, with a short line 

 of hose running into the barrel to 

 keep the liquid stirred, and a long 

 line of hose fitted at the end to a 

 slender brass rod tipped with a spray 

 nozzle. This outfit, or a great va- 

 riety of similar ones, may be ob- 

 through any hardware dealer 

 ect from any of the numerous 

 facturers of spraying machin- 



case it is desired to spray trees 



any sorts, it would probably be 



to use arsenate of lead, which 



liable to injure foliage than 



ofreen. This substance has 



used in great quantities by the 



chusetts Gypsy Moth Com- 



on. It has been found a safe 



cide for all sorts of trees. It is 



not generally on sale in the 



market, but can be made 



according to the following 



directions of Professor C. H. 



Fernald : 



"Arsenate of lead is easily 

 prepared by putting 1 1 



ess 



