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Show Tvtghenleg taatp ChlniMtt. A corrciiponilent i f n trolo Journal lately Aked, "Hat the tendenry of hnrdenod glau tu break fpoutuncoiudy yetlufnoiomimor Thnrlyto Ilia Iniulry atatM tint ' thlt irrent diniculty with liardeneil glata haa lieen nierrouio by IViIerlek Hiemelit, by pltring Iho hanleneil col 1 plain In bolhng wati r aii 1 allowing them to cool crylonly, and that ho luw jnodu euuie very Inter ottag ciinrliiunU hi fur tlio llirlln lNilytrchlilo ainltty, allowing the power of retMani-o of aucll pltlra. A lato nUiut eight Indies piaro And moro than an Inch thick waa aupportcd At it comer and on It waadronicd a weight of mora than eight luundt, from dUTcr-eiit dUTcr-eiit hdghta up to alt fwt, wllhout breiking A Accond and n third titt wiro male, tho thin pinto breaking under awelght of ono (nund tlx uuicra falling eleven And a luilf feet, while Iho annui wolght falling two foot bmkoAii ordinary platoof thoaaiiiodlmentlnni In Applying thlt prlnelplo of tutighon lug tho glut to lamp clilninoji wo aliuuMpnfir toplnco tlulunt lint hi roM ratlK r than boiling water. If Iho wuttr It heated alowlylo Iho boiling (xint, kept there for aoino time and tin n cooled nt nboe, cheap clilinneya can bu mod for uioutlu or until aoino Ail lent lfnlU thrill Wocautcttlfy from ej rimco tliat tho plan It a ue-ccMful ue-ccMful one Hull Journal of Ilenllli. |