Alexandria gazette. [volume] (Alexandria, D.C.) 1834-1974, 1868-05-21
,TERMs OF ADVERTISING:
New Method of Producing Light.
From the New York Times az


mag An interesting exhibhionotthe uses ofoxy-
tageo gas, produeedoa a price suitable for ipdus-
trial applications, according to the process Of
o4Messrs:l Tessie du Motay q 2Marechal, of Metz /,
France, took place yesterday afternoon at the
Office of Messrs9Stern,} Stevens, 70 French, No.
% NASSAU rect, The gentlemen last named
are abouttto Introduce in1 this country the I'M
aeeon1ance with this. process, which was intro
duced 50 successfully at the Paris Exposition.
Inra darkened room the effects of the illuEi
i1ator,Wsre made apparent, and we're explain
"a by, Prof. r. Ogden D5remuS the eminent
chemist "a Ihe substaaeas, employed In this
4 process are 1.-The alkaline >manganates. sIhese
salts act ASA sponge, alternately absorbing the
oxygen of Che air, aHa agaiR releasing this I'M
!'portant gas* These Operations may be repeat
ed ad ,snRaltuns with the same manganates.
This 'ektraord dinary property, is based on, the
folloWiGg reactions Ill naagaaates ARE
deceED posedat thottem nesafufeE OF. about $50
degrees Fahrenheit, by the action of "a jet. Of
ordinary steam, which iberafes the oxygen and
leaves a Eesidium composed of the sesquioSide
Of manganese and the alkaline base, contained
in the combination. q. The mangaaatss} are
regeDerated by submitting thelabove mention
ed solid residue to the action of a current of air
at the same temperature as used In the decon-
position, These operations are conducted ID
series of rctorts ,plscedina furnace, where the
mangaaates. after being raised to the tempera-
ture of S50Idogs are alternately submitted to the
action OF a Jet of steam and current of air,
4 which restores to- the mass!t the oxygen it had
lost The oxygen disengaged by the steam Isl
Il sues mixed with it from the ret0rts, the steam
is lauifed byapassing into condenser and
the pure oxygen is collected in gasometer-
When applied for the production of light, oxy-
gen in combination with common coal gas per
mits reduction in the consumption OF the lat
ter, lat the same time giving nequaf quantity
ofhght, 10 the proportion OF l63 to L. Oxy-
gen gas in thus produced at "a. price suitable
for great variety iof imetallurgical, chemical
OF other processes wherea high temperature is
required. VI ag=es.It.@ sd l!'.:
Experiments in Paris with regard to, this
ightwere conducted by Commander :Caron, of
the Music ID 4rtilerie, and 81. LIE, Branc, Of
the Emperor's household, under the direction
of the Emperor They were entirel ly success
full The Hotel de Vile and the square in
front of it were lighted with it for seven weeks,
and the Emperor has ordered that the improy-
ed light be used in the Rue de Rlvoli, the
Court Of the Tuileries and the Hotel de Vile
permanently. Besides its great brilliaucy, sitiS
nodorors, innocuous, portable and inexpen-
sive 1t is to all intents and purposes the call
ciuim light brought within the limits Of every
ebody's means itor ordinary purposes, Steps
Will be at ionce taken4te light Printing House
square, the Fifth Avenue Hotel, and other
public places and buildings, that the people
may have an opportunity, Of judging of It's SUI
pcrlOrlty. ..J.,t, tt,It..l,.r.,. r.at..aaII