by the Combuftion of Hydrogen in Oxygen Gas. 149 
iis lower extremity D. The fquare mahogany frame F G 
ftands parallel with the horizon. 
‘Near the end K of a mahogany board the brafs rod MN 
is {crewed fo as to ftand upright; it is provided with a 
fhoulder, in order that it may be firmly fixed into the plate 
MO, faftened at each angle to the board with fcrews. . 
In the fame manner the rod PQ is faftened at the other 
end of the board K, which faftening cannot be feen in this 
view of the apparatus. Thefe rods pafs through the fquare 
frame F G at H and I, fo that it may be flidden upwards or 
downwards on the rods. 
At each hole in this frame throuch which the rod paffes, a 
brafs focket (Ha) is ferewed to the lower fide of the frame, fo 
that the rod may pafs freely through it ; and that it may be 
fixed at any elevation, the focket is provided with a ferew H, 
by which the rod may be prefled againft the oppofite fide of 
the focket, and thus kept in the pofition required. ; 
The oppofite fide of the frame near I is in the fame man- 
ner provided with a focket and fcrew. 
The veffel Q containing water has a tube fixed in the 
centre of its bottom, which receives the rod and flides on it, 
fo that the veffel may be fuftained at any required height. 
By means of a ftop cock b the water may be made to trickle 
more or lefs quickly from the vetfel Q upon a piece of muf- 
lin c, by which it is diftributed over the whole furface of the 
adopter AB, and defcends by CD into the fquare trough 
D, after having ferved to cool the adopter. d is a glafs fun- 
nel cemented into a brafs cap at m, from which the tranf- 
verfe tube Be, provided with a ftop cock, may deliver the 
hydrogen gas of the funnel d into the adopter through the 
flender extremity e, made of iron left it fhould be melted by 
the flame of the hydrogen gas. 
Under the other neck of the adopter ftands the funnel g 
furnithed with a ftop cock (at f) imtended to receive and 
deliver oxygen gas by the courfe gg A into the adopter, m 
order to maintain the combufticn of the hydrogen gas. 
L3 Through 
