New-York tribune., 1870-01-03
LOCAL MISCELLANY.
THE GAS NUISANCE.
REPORT OF PROP. c. F. CHANDLER TO THE Do''''D
or HEALTH.

OF HEALTH -
Prof c. F. Chandler, the chemist W aor, sms
yao.ra n, Health has recently made an eN'o"uo ~ ~,
N thst body on what s termed by them 'no '.,aoa.
.anoe embracing In his report the me'nOu A,ter
ton which in his Judgment Ia the least :, n,,v
describing the and the dry hme or loss
inc gas with both Of which the pDbro hrV ~, tor-
IT, a., h,ch the nydrated sesquiaide OF Toh s =,
rIt ia prepared by mixing copperas VI ,po n,v.
Iran with sAked lime, ana eAPVo,'S ..iao
tnre TO the air 10 ohuiSo -. oont.i,e
NJ iron 70 the sesqmoxide. Inc iuiA 80, 49,, sa,r
bvdrated sesOuiaide OF iron snPha'e =, ., th,o
dust Two important advantages a,o,o oAepsive
u,vtpre. 1st when fouled it does mol e'oi'o -. .te
- onosnre 70 the air and, 2d by exposure 10 'e
.,ar,o,,de of IRON which has beeh onsnkeu W
.,lph,de of iron in the purifier is resouo'"' -,
nbpr beinr liberated and sesquiande OF on
Tho ixtnre NAV therefore be used again anu "sain WI
uhecomes so clogged with the snphW W m then fonnd to
. a,, nrouSntIy in the gas ~ ls thoi iOuuu ~ ~
aoes no aSt o ~ fo per cent OF sulphur ana may be
nsed for the manufacture OF artieciai bvdrateS
months aiIe' - ron In France NJ }. M; Hills
sTp1ed the natural hydrated rns ,gp,eriaI ,Sa
non or Dog s Ion W NAV be used again and again. and
does not evolve offensive odors "e % I'D NV The Nv
YorS Ga iSbt Company. the essential dherence oelng
the addition Of iron borngs or tensS; W0n "re IT, e9 m
yerted INTO an artificial hydrated sesqeue & Vi % oR oy
n,ostening the Whole with ammonaeal liquor ana ex-
passing il 10 the Some eoarseS Snap
coal is added and the mixture rs spLIhkleu WIN am
- to, Ssfcre il is placed In the purifier The
original mixture has been useI uS h LII Oi h I oSo
Years occasional additions Of borngs having been MADE
EXTENT TO wKcH THE DIFFERENT MEIHops OF PURift
FICATION ARE EhPLO1ED
M 80, ,,,o ,,roceSs has been almost entirely aban-
doncd the only works 81 which know II 10 be sed are
at Cork Ireland The dry me process though sun ia
general use I'M ills country. has been almost universally
abandoned in Europe hst because tae ioni e was AN an
intoersbe nuisance; and secondly the process 700
sYnsnsye as ihe lime be used but once, and when
,16apsted has Ut a trifng value as fertilizer The
Ianning mixture now used In many OF the European
CAS- opss but il being abandoned, at least by the Ger
man engineers for the iron ore method which is used to
prfy an the gas manufactured IN Liverpool, most II not
ali of that in London, and that in most Of the German
eitles one -. ,, ,,,,, ~, ,,r,,,oD0
COMPARATIVE ADVANTAGES OF THE DIFFERENT METHODS
The me method eftectualy remove the carbonic acid
and reduce the sulpheg compounds TO minimum. Were
there no objections 10 the use of dry lime on the score OF
cost or onensiveness. l think this agent would be
generally preferred The two objections urged against
the mon methods by those who are prejudleed In
favour Of lime are that they do not remove car
bOnic acid and Ut is caimed) that they do not
as lime The first objection is generally conceded
to be true, but there two ways in which the difficulty
gas or by taking less gas from the coal The second OBJ
lection be better answered by determining how much
sulphur can be safely left IN the gas The Engsh far
limits the amount at 20 grains In 100 cubic feet OF
gas but the used in Paris is thoroughly purified ac
cording the report Of Prof G. Lawrence smth. Au
thoes differ 10 whether 20 grains OF sulphur in every
100 cubic feet Is too much.
The Manhattan and the New.YOrk Gas Companies have
adopted respectively, the ventatDg and the oxide OF
IRON processes, but the Metropolitan Company have as
yet made change whereby the foul OdOrs were dis
pensed with IN their method Of manufacture The latter
COnfany had frequent hearings before the Board OF
Health and the execution Of the ORDERS of the Board was
postponed several times at theiy request During the
past summer they used. 10 small extent, mixture OF
she'll lime and sawdust. which had been used In New
Jersey aud abandoned, but the consumption OF gas
Increased this Fall this mixture was thrown out Inc
offensive process Is in full operation and the f0nl
lime Is act1ally used 10 ill in pier This Is especially
objectionable as 1t has already happened both IN London
aud Dublin, that making excavations for sewers in
places where foul lime had been used for nng IN, the
were killed by the gases evolved.
CHANGES REQUIRED. 1890
The introduction OF iron process would require little
II any change the apparatus Some iron mixtures are
employed in exactly the boxes the company are
using for lime, while the greatest change that could
be necessary would consist simply in taking out the
movable trays and introducing flooring OF plank pertor
ated with holes As there are two sets OF purifiers
either Of which could in OF necessity be made TO
purify all the gas made by the Company the change
could be easily made without any interruption To intro
duce the yeutilating process considerable additions
would be required TO the apparatus. suitable engine
washer, blower and supplementary purifier FOR the
used In ventiatng would be required beslds CON
length Of mains aud the necessary connections