- Morey’s explosive Engine. 109 
greatly increased, by a great increase of its temperature, it 
now reacts on the piston, while a vacuum below, adds greatly 
to = efiect. This mode acts with great energy in a small 
pr ove attached to the working piston, thin tubes, about % 
of an inch in diameter, open at top, each one of which is di- 
rectly over and enters one of the tubes of a condenser, at- 
tached to the bottom of the eylinder, which tubes are # of an 
inch in diameter. ‘The prepared air, as usual, is let into the 
cylinder near the upper end ; as the piston rises, it fills with 
the prepared air, the upper part of the tubes, and the spaces 
around them, and when the piston is nearly = the explosion 
takes pccd but the tubes prevent all violenc 
At, ar all of those springs, which are Femmsiaiied giv- 
ing oft rsoreetie gas, engines may be erected (substituting 
the gas for thatof the vapour of the liquors) to work con- 
stantly, for every desired mechanical purpose, e engines 
can be placed in any chosen situation, by only custo 
the gas through tubes, and if desi ired, the air and 
pass in due proportion through the tubes together, gee 
with a few short turns, will imsure - suitable preparation, 
although the distance should be sho 
The explosive vapour engines will work: without any fire, 
when the temperature of the weather, in the sun or in the 
shade, is about 80 or 90°, provided the charge be inflamed by 
the electric spark. With a due proportion of ether, accord- 
ing to the temperature of the weather, it is probable that the 
engine will work at any time, with only a lamp to inflame the 
charge. 
The less is the proportion of alcoho] the higher tempera- 
ture will be required, So again, the more turns, back and 
the lower temperature will 
temperature of the box gets down to about 70°, the spirit of 
turpentine refuses to come over at all, or at least, in suffi- 
cient quantity to give energy to the explosion. I have late- 
ly a a plunger, in lieu of the piston, and er the 
top of the cylinder ; 3 it works well an 
fetes A small bellows is convenient in peti 
engine in motion, or the explosive air may be blown into the 
erro and inflamed, to warm it, and commence the opera. 
