, 1877-03-09
UNSMASHABLE GLASS,

Nnffs Driven With Lamp -Chinne5a and Tum
hlera---lfow tho Do Ia Jsaatis Process tIa
t3een Developed In Brooklyn.
Ntto Tprk World.
a little over ycar agn attention WAS draw
In America 10 the fact that Mons. A. de Ia Jjasl
was producing toughcncd glass n tho glas
foundry, near Paris, by means Of = process
the details Of which he did not lrst max,
public. a number Of specimens were brought
TO thls country and experiments ssse made Will
them.
Tho genuncness Of the Specimens wss ut f1rsi
doubted, 80 incredible did tile results of these
experiments seem 10 many. II was though,
TINT they wcrc Of some substance resembling
glass, which cou1d bo thrown around the room
dashed against the floor, jumped on and knock.
ed about generally. 1t WA argued Tint In The
nature ol things. and In The light Of tle cxpe-
you dropped chunk Of iron, weighing two OF
three pounds, on q sheet Of glass quarter Of
an Inch thick tho glass would break, and that,
such sheet OF what II. ds IL Dassie offered a.. Al
glass and Il did not break you were Justified Ii,
tllnkinR that II was not glass, No hypothesis
" wilat The substancu might 6s WAS otfcrcd by
it,a skGptics, but tho existence Of some p1aus-
!Dlu selcmt FOR tho conversion Ut dollars into
francs wLs suspected, mud tho general public
looked with sonc littlc curiosity for the time
when ptUpUBltlDns for lie cn1barkQ&lon Of Amer.
lean capital should be tnade.
6cientists, however, wcru number of them
convinced that valuable process had l,een dis-
covered. Among othefs, Pr0t. EE1eston aud
troll Chandler cxpcrlmcntcd carefully with the
d. L. Basttc glass, aud i0n,l that, while II WAS
not adaptet u tho manufacture Of nnrils autI
hammers, It was really very different from orll-
nary glass. 6till tho number OF specimens ut
command was 40 small that they Ncre forced to
watt before formulating the difference, OF d.
tar III Al .tSr
In December, 1875. the lrat patent on the pro-
cess OF producing the Elass Was tak0n out In
France, and IL was then found tAat the process
consisted IN aunealing the glass By plunging It
Of the patent was obtained in 1876, and care Was
taken to obtatn patents not only In Frunec, but
In England, Germany, Austria, France, Belgium,
Huss'a' spain, Italy, Portugal, and the United
No proposition TO American capitalists was
made, but, oa tho contrary, n. Ernest do Ia
Chupe!le, cousin Of the patcntec, came IL this
country, and in January. 1870, started n foundry
la D,ooklyn, 10 whtsl; he begun the manufacture
unfortunately destroyed BY fire III June last,
and much Of tho result Of his labor was lost.
In the latter part Of September, however, lu
waa agaln under way, and although he lost ono
manufacturing In full operation.
4 visit 10 the foundry, which il In Dclcvan
street, Brooklyn, showed TINT the glassware
produced thers Is manufactured in exactly the
to the toughcning process afterwards. This
proccss 5s apparently simple onv. As only
one kind Of goods is as Jet manufactured for sale,
TINT Is, lamp p-chimneys,-thcru Is no variety
poie about eight feet long, viii . knob W on % tic
tnd oi tllo stzo OF a latnp-burncr, fits chimney
on tho knob aud plungcs It Into the latnc OF q
FURNACE. He wthlrnwe It twice or thrice that It
may i,y not heat too quickly, turning the pole rap
r$tnf1 th% rv1n Fnnn nt,CAn
rcd heat quickly shoots It Into ono OF dozen
small baiis liked on revolving table, aud sclzcs
10y Keeps tho revolylng.table always in
lin. having been tho proper timu 10 tho bath l,o
takes them out TO be dried, sorted, cleaned, and
parked. .,
begun making ctlI1nneYs 1t. was found that tllsy
wurc very liabls to explode, and after expert.
tuenttnK for considerable time VIZ found Tint
It WA bccas,se tue BATH was loo hot or too rold.
feet. Now wc l,d TINT by WORKING tjlsso tables
at Just the rats at which they arc now running
tho baths arc kept at tho right temperature BY
thn Enumeration Of tue rcd'hot glass"
d the explosion langcrousl"
@Oh! no. Tho glass simply shutters. Thct0
fs no forcc to make missiles the PARTICLES. But
We have o1vlateu that now."
"Wl,at is in the i,athi"
"Oi! Or tallow. ANY greasy substance will
We have determined by experiment. At trst
wa used l!nsecd oil. Then we mixed In mutto1,-
tallaw, a.,d found ulat It w.as au Improvement,
aud W. Used for while equal proportions of
of tho oil, anil VIC used more Of tho tallow than
0f tho oil, and found that It wAs 1ltat rs good,
Then he 70 tried all sallo~, aud found it equally
Il. dc Ia Chapcllo Ia very confident that he is
1flHnFGil In bt1kfnNSA Tint stoa n trrunf T,ttura