262 Scientific iniclicnl 
SCIENTIFIC INTELLIGENCE. 
]. Cuemistry aND Puysics. 
On the ne of Chlorine in eerie the Flame of Burning 
dies: by D. For B.G.S., F.C.8., A.1.C.E.5 (i, Bea D. Phil 
Mag., xi, 65.)—A coneidereble time back, while tiny some 
to that which would be expected in case boracic acid were pero in 
the minerals. On the most careful _epciomsie: ee de 
of the flame must have piocedded en some inate source 
As chlorine was present in considerable amount in the minerals in 
question, it became interesting to see whether its presence might have 
produed the green color; and the an Aes made on the subject 
fully confirmed this view. A number of other experiments on the 
power possessed by chlorine to eatae Gente; led to the following conclu- 
sions, which are stated briefly, as the results themselves sufficiently 
explain the modus operandi. 
Chlorids treated with concentrated sulphuric acid and a very small 
amount of alcohol produced green flames similar to those eliminated 
from borates under like — "Qaatatively, however, the flames 
were of less intensity; that is, the-same weight of a borate would 
produce considerably darker ze flames than when a chlorid was 
When chlorids were moistened with sulphuric acid and heated in the 
blowpipe flame, a faint Breer coloration was observed, which generally 
confined itself to the inner flame. 
en hydrochloric acid is a cautiously on the flame of burning 
alcohol, a greenish tinge is observa 
A jet of chlorine or of retrveetonars ‘acid gas directed upon the ee 
voi spirit-lamp or of coal-gas. produces a jet of green flame ; this 
o found to be the case when (by means of a convenient ned 
shonin gas was passed into the centre of a flame of burning coal-gas; 
or of vapor of alcohol. : 
en burning alcohol was injected into a globe filled with chlorine 
gas, the aleohol vapor continued burning at the =. of the globe 
with a very flickering but often brilliant green flam 
From the above experiments, it will be seen shat chlorine has in it 
self a decided coloring action on the flames of burning bodies, which 
may consequently in some cases lead to its being confounded ewe 
ar 
i 
es Magnetic Philospia; by Prof, Farapar, D.C.L, 
e. Roy. Inst. of Great Britain, Jan. i erat 
electric forms of power being dual in their character, 4 
