204 “Recipe for driving Insects from Trees. 
than the Calisaya,” should read thus, as it stands .in my 
original manuscript, (the error having been made in trans- 
scribing,) “Experiments which I made upon the Cartha- 
gena bark, of rather better quality than the market generally 
produces, yielded one twelfth the quantity of quinine pro- 
duced by the Calisaya arrolenda.” 
5. Quere—Indian Summer. 
‘To tHE Eprror, 
Will you please to insertin the next number of your Jour- 
nal, the probable causes of the peculiar aspect of the sky du- 
ring that portion of the month of November, commonly call- 
ed “Indian Summer?” The only object sought for by this 
question is information ; by publishing an answer to whic 
you would oblige, 7 
ir, 
A CONSTANT READER. 
Fisbkill, May 21, 1825. . 
The above inquiry eats a fair topic of discussion, up- 
om which we should be willing to receive a communication. 
. j . Eprror. 
6. Recipe for driving Insects from trees—communicated. 
—Bore a hole into the trunk of the tree, as far as, or into, the 
heart, fill this hole with sulphur, and place in it a well fitted 
plug. A tree of from four to eight inches in diameter re- 
quires a hole large enough to admit the little finger, and in 
the same proportion for other and larger or smaller trees. 
This will usually drive the insects away in the course of for- 
ty-eight hours, but uniformly succeeds, perhaps sometimes 
after a longer time. These facts were mentioned to me by 
the . Dr. Woodhull. He stated that a fine large shade 
tree in Albany, was so infested with worms and caterpillars 
nd in 
whieh were almost lifeless were restored. 
B. D. §S. 
Pe ee Cees: > 
fae ee ee ee 
