38 



Professor Peck also obtained it from the grubs that 

 inhabit the excrescences of the cherry-tree ; and 

 hence there is reason for beheving, that those which 

 are found in similar excrescences, that deform the 

 hmbs of the plum-tree, are produced by the same 

 insect. Further observations are requisite to clear up 

 this point. The larvae, whatever they may be, leave 

 the diseased branches near the end of June ; hence is 

 established the expediency of extirpating and burning 

 the tumors early in that month. Those that inhabit 

 the fruits above mendoned, enter the earth soon after 

 the fall of the fruits, and pass through their last changes 

 in the course of three weeks afterwards. Fallen stone- 

 fruit should therefore be gathered without delay, and 

 be given to swine. 



Peach-trees once were the glory of our gardens 

 and orchards, yielding their rich fruit in such abun- 

 dance, that not only were our tables amply supplied, 

 but it was used by the distiller for the purpose of 

 being converted into spirit, and by the farmer to feed 

 his swine. These valuable trees are now the victims 

 of disease and the prey of insects. From persons 

 skilled in vegetable physiology and meteorology we 

 have yet to learn, how far solar, atmospheric, and ter- 

 restrial influences are concerned in exciting the various 

 diseases with which they are annually attacked and 

 contaminated; what treatment can be adopted for 

 those which are upon the decline ; and what changes in 

 soil, aspect, and management, will ensure the continued 

 health of the young and vigorous. It is certain that 

 Jlphides and a species of Thrips attack the leaves, 

 puncture, poison, and exhaust them, and occasion 



