Morey’s explosive Engine: 105 
conimon air do, and become apeeremay as highly explosive, 
But the ei by natural evapor ; would be too slow, 
when the or demand was very P cbeteeie tute unless the 
reservoir was ery large, when it would then be inconvenient, 
expensive and unsafe. It was desirable to prepare or manu- 
facture the article as wanted. In time it was effected. It 
was alse verydesirable, (and there was not, to me, aly appa- 
rent reason why it might not be effected,) to command or con- 
trol the explosions, as we do those of gunpowder, although 
they are much more violent. Another most desirable object, 
was, to unite in the same engine, if it possibly could be done, 
the effect or force of the explosion, with that of the vacuum, 
which always” accompanies it, and that, without rendering it 
too complicated, ase and unsafe. By pursuing a 
course very analagous to that taudopted for the use of gunpow- 
1 it was in a ieasibe? or entirely, effected. 
The preparing part of the machine consists of ee 
vessel or tube, so constructed, that a Stream or current of 
tmospheric air, may pass freely through it, together tl the 
viii or gas to be made use of, both being impelled through 
a space interrupted by short turns, or other impediments, the 
object of: which i is, to blend, mix, or unite them intimately 
explosive. This apparatus admits of an endless variety of 
forms. A description of one follows; which is found to be 
perfectly safe, and probably as convenient as any: Make a 
box 6f tin plates, four or five inches wide, and about fourteen 
long, and seven deep. Divide it horizontally, into four or 
five compartments, by partitions, ie extend from one end 
of the box to within a short distance of the other end, so that 
the air, entering the lower Ha ae will be i ant by the 
poe Si to travel the w hole length of the box, go ghee! 
ompartment, in its aseent to the top ;—divide 
it eb by patie partitions, running the whole ‘cael 
of the’box, except at the beginning, or where the air enters 
and passes out, into spaces, about half an inch apart, which 
have the double advantage, of effecting by their friction, a 
rapid mixture of the air and vapour with each other, — and al- 
so of preventing violence in the explosion, in the box, should 
one take place. A short’ tube for the ‘admission of air 
other materials into the lower oe a oe We another for 
upper one, 
vent explosion, will 
VOL. INO. 1 . 
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