157 
on Electric Discharges through Water. 
(a) This very property of thus diminishing; and by the fol- 
lowing properties ; 
( b ) A certain quantity of nitrous gaz instantly disappeared, 
apparently composing nitrous acid, on being added to the gaz 
(i a ) p. 149, H. 154, Exp. iv. ; oxygen gaz being added to the 
residue after saturation with nitrous gaz, and an electric spark 
being applied to the mixture of gazes, well dried, a consider- 
able diminution immediately took place, and water was pro- 
duced; p. 154, Exp. iv. 
(c) Combustion from hydrogen and oxygen gaz took place, 
when the tube was about three fourths full of gaz, p. 152, Exp. 1. 
which was confirmed by passing an electrical discharge, under 
the same circumstances, through a mixture of hydrogen and 
oxygen gaz, p. 152, Exp. 1. 
(d) Combustion from hydrogen and oxygen gaz took place, 
when the points of the compasses were accidentally applied to 
the part of the tube containing gaz, p. 152, Exp. 11. ; which 
was confirmed by passing a discharge, under the same cir- 
cumstances, through a mixture of hydrogen and oxygen gaz, 
while the points of the compasses were applied to the tube; 
p. 153, Exp. 11. 
( e ) The observations made of the kindling of gaz in small 
quantities, from time to time, during the process of obtaining 
it, particularly while it was ascending in chains of bubbles, or 
was adhering to the funnel of the tube, p. 453, 154, Exp. in. 
confirm the evidence in favour of this gaz being hydrogen and 
oxygen gaz. 
The evidence contained under the heads ( a ) — ( e ), consi- 
dered singly and conjunctively, I apprehend, must be admitted 
