It appears thei-efore from this experiment tliat arsenate of soda 

 cannot be used as an insecticide except in exceedingly small propor- 

 tions, and then the caterpillars live so long that rains are very liable 

 to wash ofif the poison and they recover from the effects of what little 

 they may have taken. 



PARIS GREEN AND LIME. 



A series of experiments with Paris green and freshly slaked lime 

 in about equal parts, was performed on tent caterpillars sleeved in on 

 the branches of an apple tree. The spraying was done as in the 

 previous experiments with the Woodason Liquid Spraying Bellows 

 which serves admirably where a small amount of spraying is to be 

 done. 



June 5. Sprayed a branch of an apple tree with Paris green and 

 lime in the proportion of 6 lb. of each to 150 gal. of water, and 

 sleeved in ten tent caterpillars upon the branch. June 6th, one died ; 

 on the 7tb, one died ; on the 8th, five died ; on the 9th, two died ; 

 and the last one died on the 14th. The leaves were not injured. 



June 5. Sprayed a branch of an apple tree with Paris green and 

 lime in the proportion of 8 lbs. of each to 150 gal. of water, and 

 sleeved m ten caterpillars. On the 8th, seven died, and the remain- 

 ing three died on the 9th. The foliage was not injured. 



June 5. Sprayed a branch of an apple tree with Paris green and 

 lime in the proportion of 2 lbs. of each to 150 gal. of water, and 

 sleeved in ten caterpillars. On the 6th, four were dead ; the rest 

 died two days later. None of the leaves were injured. 



June 5. Sprayed the branch of an apple tree with Paris green and 

 lime in the proportion of 1^ lb. of each to 150 gal. of water and 

 sleeved in ten caterpillars. On the 6th, two were dead ; on the 9th, 

 four; on the 10th, two ; on the 11th, the rest were dead. Foliage not 

 injured. 



June 5. Sprayed a branch of an apple tree with Paris green and 



