Recipe for defireying Caterpillars. .- 17 
towards the under fide of the buth, which is to be raifed and 
Aupported by the hands of another perfon ;. and by drawing 
your hand gently over the hairs of the brufh, the abave li- 
quid is fprinkled and falls in fmall drops on the leaves: the 
confequence of which is, if the eggs are there, they never 
come forward; and if they have already generated worms, 
in a minute or two after the liquor touches them, they either 
die, or ficken fo as to. fall off the buth, at Jeaft they do fo upon 
giving it a little fhake. If, upon their thus falling off, they 
fhall not appear: to-be completely dead,, the buth fhould be 
held up, and either a little boiling water from a watering- 
pan thrown on them, or a bruife given them by a fpade or 
fhovel, or the earth where they lie turned over with a hoe, 
This preparation does not in the leaft injure the bufhes, 
The liquor here meant is generally not in the fame ftate it 
is extragted from the.tobacco, but is mixed by the tobacco 
ananufacturers with cold water, in the praportion of four or 
five pints of water to one of the original juice or effence. 
Therefore, any perfon; who may purchafe the juice itfelf, 
unmixed, muft mix it with water, in the abaye proportion, 
and the quantity of alum mutt be about an ounce for each 
Scots pint of the mixture. nes 
Dr. Monro’s report was in the following words :—I ob- 
ferved, along with Mr. Hamilton and Mr. Gordon,, (two 
other gentlemen of the committee,) and two gardeners wha 
were prefent, that fuch caterpillars as were wetted by the 
liquor Mr. Henderfon employs, , were killed in a very few 
minutes, and the experiment has been repeated by my own 
gardener with the fame effect. I have likewife found, that 
it kills a kind of green fly, which is yery hurtful to the 
leaves of plum-trees and other fruit-trees. . Jt has been 
very generally known, that the {moke and the juice of to- 
bacco weré pernicious to different. kinds of infects and 
worms; but it has not, fo far as I know, been employed in 
Mr. Henderfon’s manner; and as this has the advantage of 
not hurting the leaves, nor the fruit, I confider it as an uleful 
and material improvement, well entitled to a moderate 
premium. (Signed) Avux. Monro, M.D. 
Vou. V. D V. On 
