208° abate of Fron, —Eleéiricity of Tce... 
fagar is broken, a new furface being prefented to the ait a 
real acidifying proceis infantly sakes place: a fmall portion 
of the oxygen’ of the atmofphere unites itfelf with the fugar, 
but not enough to form faccharine acid, as the quantity is not 
perhaps fafficient. for that purpofe; bed at the-fame moment 
the atmofphere in‘contaét ‘with th the new furface of the fugar 
is fo changed, m regard to the proportion of its component 
parts, that it affects the olfactory organs in the fame manner 
as nitrous acid. This phenomenon may receive fome ses 
jluftration by repeating the experiment ua clofe vellel.’ 
A SINGULAR OXYDATION OF IRON. 
Dr. Juch alfo gives the following fingular nottce :— 
« | had,” fays he, “ a fmall leather flafk filled with iton 
filings, which } frequently ufed with my electrophorus both 
charged and uncharged. I had occafion one day for a quan- 
tity of pure iron, and, having no. other at hand, had recourfe 
to the filings in the flafk, which I knew were pure. I emp- 
tied it on a picce of paper. I laid the paper on my hand in 
order to convey it to the place of its deflination; but T had 
fearcely held it a few feconds when I perceived’a {trong heat, 
which inereafed fo much that [ could no longer hold the 
paper. -Some minutes after, the paper became brown, and 
at length took fire. It did not, however, flame. The iron 
Ainge were’ in a ftate of ignition; and. when the heat‘had 
décrenleay } foumd the iron converted into a highly friable 
exyd.” 
ELECTRICITY GF ICE, .. 
The fame author mentions, that.eleétric fparks: may Bis 
sbtained by the ufual manipulation froma cylinder of ice. 
Thole who may not be afraid of the labour, can make the ex+ 
periment at the temperature of — 16; R. = — 57125 Pabr. 
