150 Apparatus for producing Water 
Through a collar of leather, fixed in the tube between i and 
A, an iron wire paffes, bent in the direction A e: the end of 
this wire ate is at the diftance of one-eighth of an inch 
from the end of the tube which fupplies the hydrogen gas, 
when the wire ftands in this pofition to deliver the eleétri- 
cal fpark, and inflame the hydrogen gas as it ifues, The 
end of the wire at iis fcrewed into a {mall brafs ball, by 
which it receives fparks from the larger ball k of the eleétri- 
cal conductor. 
The funnel containing oxygen gas enters water to the 
depth of three or four inches in the veffel RS, the fize of 
which admits a pint bottle of gas to be introduced under the 
funnel and delivered into it. The veflel TU ferves in like 
manner for the fupply of hydrogen gas to the funnel d. 
When it is intended to accelerate the combuftion of the 
gaffes, the hydrogen funnel muft be kept conftantly full, 
fo that it may be prefied upwards by a column of three or 
four inches of water: at the fame time the exygen funnel 
mutt be fupplied fo flowly that the water may rife in it five 
or fix inches above the common level. In the contrary cir- 
cumftances the combuftion may be retarded at pleafure ; but 
care muft be taken that the hydrogen gas iffue in a conti- 
nued ftream, and the flame be maintained, 
As jt is neceflary that the adopter fhould be firmly ferewed 
to the fquare frame, and yet eafily feparable from it, the fol- 
lowing provifion is made : 
ab is the neck of the adopter through which the gas is ta 
be introduced. The lip at  ftrengthens the mouth of the 
adopter. d is the external projecting part of the glafs ftop- 
per, which is accurately ground to fit. This ftopper being 
ground to a fmaller diameter between d and g is there ce- 
mented into a brafs cap gf.. The flender wire which is ta 
deliver the electric fpark is continued through the glafs flop- 
per dtoi, The oxygen funnel g communicates by a nar- 
row paflage with the cavity of the adopter round the wire 
ie, The neck of the adopter is imbedded in the mahogany 
frame ; 
