, 1875-06-02
rEpt1rEAcilel EtN4gs

H'fI1 7iRl&ss
Our Paris corr espunlent WFitos under date
1fay o: "fou gave MI account Il lew acekB ago
Of tho discovery oy II. Francois do la bastie.
Frencll engineer. OF procoss by which basa
to bo brittle. Yesterday evening 81. ViotoF ua
LuyneB, Who with u. 10 BastIe'B sanction, has
for son,e weeks been making experiments ht q
glaes mnuufattoty, delivered \ lecture on tho
do socours do. Amls de. scienoes. II.
Dumas, tho distinguished Chemist aud pcr-
manont Secretary Of the Academic des sclenccs.
presided. aud tIa iar.n amphi,lcatrs Ut tie
faculty Of Arts 81 tho sorbonne WAS crowded,
most of the members Of seiensiao bodies aud
the clfct gtaHs manufacturers being among tbs
audience. II. de IL DAstio hlu,self via. also pre-.
hont. NJ. do Luruea explained tho e1panalon
aud cnmpsueaon OF tue exterior and interior
parts oAised by lmmersing g'ass heatea to GER
taln temperature IN an oIeaginous oath. and ho
gAvs sonle highly interesting psoofa OF the Bt,c-
cess Of tho procuhB. Thus he applied sono yig"
o.ous blows with hammer to q pieco Of glass
which III ito ordinary condition must hayo
becn broken into fraEmeuts hut
which sustained this violence without beiug
auy tho wosHo for 1t. small tubo Of tuin
twlsttd glass being fastened In a vice. be eu-
deasored to break OF tho extremity OF II with u
temp.s and by dint Of much evident muscular
exerton tiItt he succeeded IN doing 30. fur
naoc, moreover, wns brought into the hall, and
uulnbor Of small globes aud p'eoes Of sAoet glaan
do Luyucs then threw some OF tslan on the
floor to show thai they could 0rar tho shock.
The globes woro fastened By strlngs to usayea
Of wood at VARIOUS laghts, aud 10 assistant
mounting laidor aud sotting lire 70 tue
stsipg. they fall Oh tho tabto With considerable
| force, tho,,ce roboundtnE on tho aonr, but ony
| one or two Of them wpre fractutet, aud thoho
| only when falling four or five yafda. Tue As-
| sBtant A!ao mounted on 4 cnryod plato OF gaas
placed gu the table so ~ to represent 30 arc OF
| crno, but though the portion OF tbs glass On
| Which lie htood VIVA An iuch or two above ths
| tablo 1t bore tho weight Of lis body. a similar
stccesstul, but IL. de Lu.nca stated thht It had
previously borne tho strain, though it had
been necessary for tho assistant to
mount upon 1t somewhat carefully 50 a.
to oaua'ize the pressure ha much - possttlo'
or eourse. u. do IL Dastio. - II. Do LuYncs az
plHiued, docA not pretend that glass tlus teta-
pereu IL absolutely free from danger Of break
Ago, but ba dea'arca that It will bear eghty OF
1uo t'mca tho. stsain OF Ordinary glass, snd last
u9ht's experiments Afforded conclusive evldenoe
| Of the value Of tie discovery. THIS glass, more
oye5 It ia stated. can 10 cut undor ceftau condi-
tionB IL easily a. common glass uy mssns OF
ths electric Hight 81. do Luyues gave sofno intor.
ontiug experiments OF the optical psopert'es Of
glass;. tha distribution Of the culota which uerc
very brilliant depending 90 tho Bhapo given to ths
object The audience shoued tha utmost inter-
ont 10 the experiments aud explanations. the for
d@a.bilIsv Sxss of g!.ss srteoss vii obvous b.
disadvantage to tho trade, but against this n1ua'
be sas ths use OF glass for nnanv purposes from
which !ts brlttlenesa has hithsr:o excluded u
Not only will 1t bs applied to many domestic
purposes. but in some branches Of manufacture
it ii likely materially to chospen ptoduelon. In
chemical works. for example. metallic chambers
which arc sxpeus.ye withou. belns durable, wi
certainly be substituted by glass. u. DO Il baa
tts u taking measures for the practical working
Of his d!scoSory, aud bis Epgl,h agents, 5losssa
Abel Roy DrothefB, OF ~ Mincins !ane, e1hlbis I
number Of ar.iclea to which It has bsen Alrssd!
| hi NIL