9qq WATCHING 



■^ A^fD SPRAYING 



proportion and ways, but it is not so easy to 

 know how strong it is as with Paris green, and 

 it is being used less and less each year. 



Another preparation is arsenite of soda, 

 which is made of white arsenic, two pounds; 

 carbonate of soda (washing soda) eight pounds; 

 water two gallons. These must be boiled in an 

 iron kettle, which should not be used for any 

 other purpose, for about fifteen minutes, or 

 until the arsenic dissolves. Some water will 

 evaporate during boiling, so, before bottling, add 

 enough to make the full two gallons. This 

 will keep a long time if tightly corked. To make 

 a spraying solution add one-half pint to 25 gallons 

 of water. The quantity given is, therefore, 

 enough to make 8 barrels of 50 gallons each. 

 Unless mixed with Bordeaux, add two pounds 

 of slaked stone hme to each barrel. Be sure to 

 mark your bottle of solution plainly, "POISON." 



Arsenate of lead clings to foliage better than 

 any other arsenical poison, and since it does 

 not burn foliage it can be used alone, in the 

 proportion of from one to five pounds to 50 

 gallons of water. It was first used in 1892 

 against the gypsy-moth and is annually grow- 

 ing in favor. 



All insects which feed on the outside of plants 

 are divided into two classes — the chewing or 



