54 



gravity of 1. 0075 to 1.OC025 will in most cases be 

 found safe and satisfactory. On account of the 

 difficulty in making the home mixture and its vari- 

 able composition most people prefer to buy this ma- 

 terial in the commercial form. Each commercial 

 brand is usually uniform in its density and can be 

 easily and conveniently prepared for use. The 

 common strength for dormant use is one gallon to 

 eight or 10 gallons of water. As a summer spray, 

 it is diluted all the way from one gallon to 30 

 gallons of water, to one gallon to 80 gallons of water, 

 depending upon the plants to be treated. 



Biting insects are attacked by spreading some 

 actual stomach poison over the parts of the plants 

 being attacked. The poison is in this manner 

 taken into the system of the insect with its food 

 supply and quickly causes death. Paris green and 

 arsenate of lead are the principal poisons used for 

 this purpose, the latter being by far the more com- 



CABBAGE AND TOMATO TRANSPLANTER 



