\ 
108 Hare’s New Galvanic Apparatus, Theory, §. 
we the other nypaheten which supposes it to be electri> 
al 
one. The finest needle is competent to. er" 
ro product of the — powerful machines without 
ment, if received gradually as generated by them. Platina 
points, as small as those which were melted like wax in my 
experiments, are used as tips to lightening rods without in- 
jury, unless in sudden elapetee produced under peculiar 
circumstance 
The following experiment L.conceive to be very unfa- 
voural the idea that galvanic ignition: eriep:ifrom:a 
current. ofe electricity. 
- A cylinder of lead of about a quarter of an he ey 
and about two inches long, was reduced to the thickness of 
a common brass _ pin for about three quarters of an inch. 
When.one end was connected with one pole of the appara- 
tus, the other remained suspended by this filament; yet it 
was 1 ealonife uta fused by contact: with ie othe es As 
all the calori 
poo ay my ees caloric: is not iepamated from the 
electricity until circumstances very much favour a disunion, 
as.on the passage of the compound fluid through oe 
the air, or a vacuum. In operating with the deflagrator, 1 
have found a brass knob of about five tenths of an inch in 
ace to burn on the. superficies only ; where alone ac- 
ding to my view, caloric is separated so as to act on the 
_ Having, as mentioned in the memoir on my theory 
of gal pei found that four galvanic surfaces acted well in 
one pal goa I was tempted os means of the ws gone cone 
y coils 
being surrounded by copper, it seemed probable, shang if 
electro-c as 
aloric i had sugested, carried forward by 
circulation arising from galvanic polarity, this might act 
‘thin the interior of the coils, yet not be exerted between 
7 one coil and another 
*See Adams's Electricity, on pane 
