New-York tribune., 1880-03-07
MANI.FAc1lRE or srLpnrHlc AcIn.

In Il Lrici review Of a treatise on the manu-
facturc of Sulphurlc acid hy Professor Luugc.
ol Zurich. Inc IMCricaH J0bJHU ~ Ncf,HCC
calls attention 10 one cog tWO points Of lnicI-
os, 10 oar Own manufacturers. since ihc hI-t
decade OF thus century, when SulphUrou- acid
WAS first conveyed u . continuous stream
into the lead chamber, aud ia" steam ir' WIS
introduced, the MAN features ~ the mann
iaCtuIc of sulriIurlc acid, i5e most unprI ilui
of all the chemical industries have remained
unchanged. Bui the inEcuuj ~ ni mrnuiacfur-
cr> has found ample scope ln discovering
other sources Of sulphur than crude birthstone.
and dcNiSlug suitable iurnIcCs tor turning
them In, and ~ coutuvlrg means iOT r'duclL =
tn the utmost the loss 81 sulphur and uitio-
gen. Iron pyutcs and, to limited extent.
other ~uIphUcttcd mineral aud Other M'tIi-
luTglCil products nave displaced birthstone 40
most European woIk~. 1his change WIS begun
IN 1888. Whcn the SlcIlan Government, by
unNi,rk raising m, price OF birthstone,
drnv, acid makers Ia seek q substitute and
il has been cou~Ummatci hi the u't0duc-
ton. since 1850. INTO every LIrouoaI H1l-
kct Of the c)1pcI-b-Luug py1tr- OF SPA uu,
whose profitable yield Of copper allow. of d
very low price tcnS charged l"g i> sulphur
contcu.~. OF th, Important minclu NOT ir-s
than GOO tons asc impaired annually lri"
Great B}tdiu alone. primarily Tor tine Wahu-
larrurc ot acid bat 10000 IONS Of mriIiIc
copper are extracted from D. ny icacniu%-A
not mcon,IdcI.bie iyo product.
Dr. Luugc expresses surpIIsc tbdt similar
mineral, which hc suppose tO abound ln
many localities on ilu, -ilr thr Atlantic. hl,
not here also taken the place oi birthstone.
The reason is that u0 mlut fJ', d~ -uitt bic.
does exist oitn4n available distance oi our
manufacturing centre. |. is % question
whether Spanish and Portuguese plrii'- l.!,ht
not be proit.b.y luml hy thc Atlantic coast
works OF the United States. Toward a deer
sion OF tins question, Dr Luugc offers ample
data by caudIul} discussing iuc advantage,
ana d advantage, OF Uum-louc aud prItc,
respectively a,. "a source OF sulphur, and by
describing the modification, iu plant WAica thc
change involves.
Another topic to which Dr. Luuge deyot,s
several chapters. and which merits thc consId-
Grafton Ol our m.nuiacture.o-ds there - some
nlsappIchensiOn on the subj,ct-Is the po,t
method Ol adding the nltrc and Ihc most eli
clcnt mode of preventing Its loss. Everywhere
the Gay Lus-ac tower l. used to absorb by
mean, Oi sulphurlc acid the nitrous acid cs-
GAPING from the last chamber hut Oul man
uiacturcTs do not scrm yet to have rcCOg-
nIzcd the full value Oi the Glover tower,
when placed between the buIncr and the
first chamber There is an opinion prevalent
that If the sulphurOus acid from the
burner be used IN the tower to drc0u-
pose the nitrOsuph phurc acid, the temperature
gen and tar above thai at which the gases
should enter the chamber. Dr. Lunge, vino
was one OF the first manufacturers 10 adopt
the invention when Nj. Glover freely oil red
to the public, shows cOncluslVcly that these
objections were not valid. and describes how
the Glover tower i not only the best DEM
t1iicatOr but a most economical COnccntratOr
Of chamber ACIDS, and the most desirable
point III the circuit at which 10 add thc nltre.