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tobacco, it will be proper to let the water be poured over 
the leaves in a boiling state. The liquid may remain 
covered up a few hours, or till wanted for use. Be- 
fore it is used the leaves must be taken out, taking care 
to have the whole water squeezed from them. Any quantity 
that is necessary may be made at a time, as it will be no 
worse for keeping, especially if kept air tight. 
mEPARATION OF THE SOAP MIXTURE, &c. 
It may be proper to notice that the following ingredients 
here introduced are not merely to make up a recipe without 
being of use ; but the whole ingredients used have some 
effect of themselves upon the insects they are intended 
for, providing the mixture be made sufficiently strong ; but 
where two or more are put together it will be found to be 
more effectual, — for instance, the soap of itself will kill all 
kinds of insects where it is introduced with the tobacco water 
as a remedy, and the tobacco water in such cases will have a 
similar effect. By the soap being added to the tobacco water 
and applied warm it is assisted to adhere to the insect 
much better ; and the reason why tobacco is added to the 
soap when it would be effectual of itself is, that the soap if laid 
on too strong at some periods, would prove rather injurious, 
and therefore, with the assistance of the tobacco it answers the 
purpose much better. The proportions of the ingredients 
here laid down must not be much deviated from, or a 
proper effect would not be produced. The soap used is to 
be sliced thin, and dissolved in soft water, on a slow fire, 
which will be done in fifteen or twenty minutes, with only 
very gentle boiling. All the soap mixtures must be put on 
as warm as may be supposed the trees will bear without 
being injured. I may add, as a rule, if the hand can just 
be borne in the liquid without inconvenience, it will be in 
a proper state for use. 
