330 Account of « new inflammable dir Lamp. 
Art. XIX. Account of a new influmalable Air Lamp, by 
Hall. 
Professor Jacos os of Nas assau 
TO PROFESSOR SILLIMAN. 
Princeton, Feb. 11th, 1820. 
. Dear Sir, ee 
Phe eet facility with which hydrogen gas may be in- 
a moderate electric spark, suggested to 
flamed by even 
Volta his *ofleniniable air Jam his, with a slight altera- 
tion, was patented, as a source , of instantaneous light; an 
has not. been so Happily re removed; the s elentig phot Which 
is connected with this instrument, is, like all other electrical 
Description. — 
A Serpe at the end of the volume. } 
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