TWELVE] OUR RIVALS—THE INSECTS 
half as much. It will not burn the tenderest foli- 
age when made according to the following prescrip- 
tion. Boil together for fifteen minutes 
Water Bas ...2 gals. 
Sal Soda ....... 8 lbs. 
White Arsenic. ... .2 |bs. 
When the arsenic is entirely dissolved the mixture 
is ready for use. Place one pint, together with two 
pounds of slaked lime, in a barrel of water. The 
value is equal to one-quarter of a pound of Paris 
green, and costs much less. 
White hellebore and pyrethrum are generally ap- 
plied in water, one ounce to three gallons of water, 
or they are used dry, mixed with one-fourth part of 
flour, to make them adhere. These poisons are 
used chiefly on ripening fruit, such as currants, be- 
cause they lose their poisonous properties very soon 
after being exposed to the air. 
Kerosene emulsion should always be kept on 
hand. It may be made by dissolving one-half 
pound hard soap in one gallon of boiling water; 
add two gallons of kerosene, and churn the mixture 
with a pump until it is so thoroughly mixed as to 
constitute a soap —that is, for about five or ten min- 
[2738] 
