New-York tribune., 1872-11-06

snsIiy capable Of bsisg thuI successfully troatsd
100 much me IA contained In them. To thf
country too wood is 80 available for building purpose
that may not be possible az present W make such a.
enterprise profitable but at me no Ssos % o as o ~
by destroying tie wood and hence any sneh proceaE
deserving Of mHsh stesnmon h0t OBJ" e " lSer %es,
moreover. az she non Industry crows np methSas ~.
States, where timber rss been much more 8DunhAn1
YRsScH METHOD OF NAKTS9 SAND IRON sLAo.
Neither Of the previous processes, however are Of @
great importance that Invented by n hiSarS
director Of the work. Pranche COlat6 This methcds
not to employ the ssg directly fora artificial stone
pressed bricks but reduce 10 Inc stats of division
in which II beeanes capable Of grest variety II
The channel through whch the molten Stag hows from
s9e luracs - I n ~ ~ or excevstl', o. sr'h1- the
water, The laya-ke stream oi sag - blown ana DrokS.
INTO of fine porous gravel which tho row of tns
water then bears along the pit Meanwhile the ros
grains contained in the sag. which Prsy"usY we're sep
arared by crushing, are now soTtru Oa, ~ s ~a, 9
process sinking 20 the bottom by their weight
being carTicd with the rest The s.as -.,nl ,.
lating IN the pit II charged thence lnio W'.s % o
road csrs by means Of IN endless oDaih anu SUI S.e
driven by an engine run oi no. gi.rs rSa 10,
The cost OF this process - only come -syei' Oons -
uD. q renders the Stag easily tfanspoftagle, 1Nu ~
penses with murh la9or "a, anu hadt,ns n, Tbs
artificial sand or gr1nulaied sLiE bhas =.
duced - found 70 he not merely easier ann
get nd o. but applcaDie 70 nubPeI o =. - .d, "a
The frst Cf these u for casng-sand ana Pigs mhdt -
sucn 3 bed" come ont exceedingly handsome tne
bright This material - pow very largely used ioI tAs
purpose IN some parts OF Franco, selun, ana ~ ~ -
IN
natural ougOwth Of the last, VIZ % use the nner po
tOns separated by sitting 10 sand the mOd- Tor hce
thtn common ssnd ana the CASTINGS were improved
Another for tins ARTIFICIAL gravel TOT Iat
good deal of force That material found good l,r
such purpose abroad might be i-ed - advantte We
us Tor cur lrIyes aud DOulsvaTds. The RrauAs1 rias
j. very porous packs well. and holds very ntls wet
Again the -8gsand u found 70 form an excenens Cou
crete ike moItar and only 80 but 10 = cspiDe o1
being used for cement. This last Prof Egieston 70
CARDS a. the most important point Of al and 20 Ioi-s
Ike firth
this subject during hs present yis abroad ~Ai1A 20
Will be aDe t0 set forta on his return A. any tae 70
learn mat hrstcass cement DE- thu, produced roa
almost any saa at very small cost, and that if-e
mandatory has been erected for '.s purrosa 81 -
long aud fun experiment. a. one Of the leading deruan
works
slAG-sASD A GOOD MATERIAL Foa BRICKS.
The artificial sand also found % be- good mdterih
FOR bricks The attempt 20 make bricks directly rom
the alag by pressing It in mod- has had but limited
success at best; but this ranulated alag, mixed with
little lime and dried in the sun yields light warm
and pleasant brick 81 n very smu cost ~ the Ceorg
Murien Hntte in Hanover fhis brick nov u.el 1mo,s
exclusively for the buildings ~ In. works r. insteaa
Of sun-dryng, these bricks are sanded over via
the rranuated Stag and burned IN kiln out Of direes
contact with the coai they become enameied on the sur
The color OF this gaze varies with the conposi
ton OF the slag. ~ Woun se no, - nlS Sr co,1.e not
tery and tiles. bat tor ornamental Drick-wok IN
creased attention beginning % oe Ven D AhelcaH
tihle Of much variety and sometimes OF msol D'r.
some medieval structures in Northern Italy II It were
found possible. certainly seems " De now pIOtou -
nanufaetre enameed bricks OF different eOl0rs cheapV
nv means OF this hitherto waste material, 70 may wei %
NJ reat conseg nence In American architecture. Othes
nsas for this Sagsand also described, suc4 A Ola
nI0yfne N upOn land for the lime aud silica eOn'
tained, manufacturing friedrich, &ci ont on tneSS
thera IA not space 70 dwell. Enough has been saie
10 show that recent experiment and discovery sDroaa
have opened the way % number OF valuable ecopomet
and vemens which IL IL highly desirable That 10
ON this side OF the water should Oe ready 20 adopt "a
soon and IA far as circumstances here will warrant We
NAV hope that when Prof EgiestOn returns this AW
sumn hs viii bring with hm pew store OF infornsEoS
ilnstratfve specimens add 70 those that 10 M all
ready gathered in the school OF 5Inel. q show tss
methods and resuits "a thi> branch OF eenhonc ns
dustry. MeaDtDS would IL not be well worth wne 'os
soms Duhc or corporate bodies IN TINS eOsnaf 80.
NJ our industrial societies, 10 make te suDect ve
Of Especial attention. and perhaps 70 oucr pr'Ss'
successful experiments
Heo- York, Oct. q, 1872.