Dr. Hare’s Galvanic Deflagrator. 203 
Deflagrator that we can suspend the operation at any mo- 
ment, with the same facility with which it was commenced. 
A look, directed to the assistant, is sufficient to raise the Lapa 
out of the fluid. All action instantly ceases—neither the 
metal nor the fluid are wasting any farther, and the aioe 
Is therefore at ease while he illustrates and reasons, and 
again to domi in ean ee objects, and thusto impart 
new energy. I found the power of the instrument to last 
for several days, although declining, and the same charcoal 
points, when well prepared,* would also continue to operate 
days. When ‘the coils, after immersion, had 
been suspended, for some hours, in the air, a coating of 
green oxid or carbonat of copper always formed on one 
part of the outside of the copper coils, and on the same part 
in all, but no where else. IfI do not misremember, it col- 
lected next to the negative pole, but was, of course, always 
removed by the next immersion, though it was formed 
again at the next suspension. 
One circumstance seis ed. during these experiments, 
which demands farther a 
In the hope of uniting i srs of your Deflagrator, with 
that of the common galvanic battery, I connected your : in- 
strument with the powerful one mentioned above. 
stru 
commo ‘eliotn, in a very decided manner; ‘bu, on 
connecting by the proper poles, the battery of six hun- 
dred and twenty pairs, with the aghtgrotor. a eighty coils, 
was y ding the pow- 
er of both instruments so completely sas vee that, at the 
joints where a moment before, and when separate, a stream 
of light and heat, hardly to be endured by the eye, was 
peured forth—now, when connected, both instruments could 
the minutest s On separating the in- 
ay pi 
‘struments, they both resumed their activity ; on again con- 
necting them, it was again destroyed, and so on, as often as 
f L t 41. i ihle 
* By igniting pi Any 
