THE 9^9 



GARDEN YARD 



of arsenic or of kerosene emulsion, and occasion- 

 ally whale-oil soap is used. The most common 

 form of arsenical poison is Paris green, of which 

 about 2000 tons are used annually in this 

 country; this is mixed in the proportion of one- 

 half pound of Paris green to 100 to 150 gallons 

 of water and one-half pound of fresh burnt lime. 



However, where the insects are very bad, 

 as potato bugs often are, the same amounts of 

 Paris green and lime may be mixed with only 

 50 gallons of water. Paris green is too caustic 

 to apply stronger than that, except in very 

 rare, specified cases. The Paris green should 

 be mixed with a little water till it is smooth, 

 before it is added to the larger quantity of water. 

 Sometimes it can be sprinkled on, but the only 

 sure results are secured by using a spray, either 

 hand or power. 



Sometimes Paris green is added to the Bor- 

 deaux mixture, and the crops sprayed for in- 

 sects and diseases at the same time. When 

 this is done, you regard the Bordeaux as water, 

 and add the Paris green in the same propor- 

 tion as you would add it to water. In this 

 case you need not add the lime, because the 

 lime in the mixture is sufficient. London 

 purple is sometimes used in place of Paris green 

 for the same purposes, and in exactly the same 



