June 5. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of 24 lb. to 150 gal., and sleeved in ten 

 tent caterpillars. This was done by drawing a bag made of cheese 

 cloth over the end of the branch and tying it on so tightly that none 

 of the insects could escape. On the 6th, two died ; on the 7th, one ; 

 on the 8th, six ; and on the 9th, the remaining one died. 



June 5. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of 12 lb. to 150 gal., and sleeved in ten 

 caterpillars. On the 9th, all were dead. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of 6 lb. to 150 gal., and the next day 

 sleeved in ten caterpillars. Ou the 8th, all were dead. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of 3 lb. to 150 gal., and the next day 

 sleeved in ten caterpillars. On June 9th, all were dead. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of 2 lb. to 150 gal., and the next day 

 sleeved in ten caterpillars. The first two died on the 6th, and the 

 last two on the 10th. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of 1^ lb. to 150 gal., and the next day 

 sleeved in ten caterpillars. On the 6tli, five were dead and the last 

 two died on the 9th. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of 1 lb. to 150 gal., and the next day 

 sleeved in ten caterpillars. On the 6th, one was dead ; by the 9th, 

 nine were dead ; the remaining one survived until the 12th. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of f lb. to 150 gal., and the next day 

 sleeved in ten caterpillars. The first two died on the 5th, and the 

 last one on the 10th. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of f lb. to 150 gal., and the next day 

 sleeved in ten caterpillars. On the 6th the first one died, and the 

 last one on the 16th, though all but this one were dead on the 11th. 



June 3. Sprayed a branch of an apple tree with arsenate of lead 

 in water in the proportion of | lb. to 150 gal., ami the next day 



