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tlie smoke may be forcibly directed against any plant that 
especially requires such attention, A cheap instrument of this 
description may be made by any tinman, to fit on the tube of a 
pair of bellows ; or, which is better, that of a patent blower, on 
account of its continual blast. It consists simply of a tube of 
any convenient length and size, having an enlargement near 
the end that fits on the bellows, formed as a box, made to part, 
and receive the lighted tobacco. A finely perforated piece of 
tin or fine wire lattice, placed on the one side of the tobacco, 
will be useful to prevent the smaller portions from being blown 
through the tube. When the tobacco is set burning, and a 
steady blast of air blown through it, any enclosed place may 
soon be filled with smoke. 
Another method of bnrning tobacco has of late been prac- 
tised, that of connecting it with touch-paper; that is, soft paper, 
soaked in a strong solution of salt-petre, and then dried. If a 
layer of tobacco be laid on this touch-paper, and both be 
rolled up slightly, into sizes somewhat larger than cigars, so 
that the paper and tobacco be intermixed, they will burn toge- 
ther freely; the salt-petre (nitre) contained in the touch-paper, 
being sufficient to sustain combustion. In order to keep these 
rolls together the outer edges of the paper should be pasted up 
their sides. A modification of this plan is mentioned in tlie 
Gardeners’ Chronicle, which is to roll the touch-paper up into 
tubes, like sky rockets, and then fill them with tobacco. When 
lighted, the case of touch-paper burns gradually, and the tobacco 
also, from the assistance it thus obtains. 
In these latter experiments, where salt-petre is used, it should 
not be forgotten that both nitrogen and oxygen will be evol- 
ved during combustion. The quantity will be small, and should 
be rather beneficial to vegetation than otherwise ; still an 
overdose, may perhaps, be inadvertently administered. When 
plants have been thus fumigated, they should continue closed 
up till the following day, that the full effect of the effluvia may 
be obtained; then it will be desirable to syringe and thoroughly 
wash the plants from the dead insects. If any happen not to 
be destroyed, they will be found, if the fumigation has been 
properly performed, so weak as to yield to the washing, and 
the plants be left thoroughly divested of these troublesome 
intruders on the florists’ pleasures. 
