Article View: sci.materials
Article #18Re: The Nature of Glass
From: PHILIP LIPPEL
Date: Fri, 30 Oct 1992 01:20
Date: Fri, 30 Oct 1992 01:20
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In article <73015@hydra.gatech.EDU>, gt3716a@prism.gatech.EDU (Josh 'I'd MUCH rather be driving' Freeman) writes... >In article <1992Oct29.144748.7474@msc.cornell.edu> rob@lynx.msc.cornell.edu.UUCP (Rob Vaughn,302 Thurston Hall,50637,2730428) writes: >>> 2) Does glass "flow" or "settle". producing waviness and thicker areas >>> at the bottom of a pane? > >If I can remember correctly, the largest refracting telescope in the world, >(40") has to be rotated in it's tube once a week to keep it from "flowing" >Also, it is possible to measure the change in thickness in glass in some old >catherdals. I think the evidence for flow from old windows is less than conclusive. Apparently in the days before float glass, window panes were uneven thickness when manufactured. It was standard practice to mount the glass thick side down-- or so I've heard.
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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!uwm.edu!cs.utexas.edu!news.uta.edu!utarlg.uta.edu!b259phl From: b259phl@utarlg.uta.edu (PHILIP LIPPEL) Newsgroups: sci.materials Subject: Re: The Nature of Glass Message-ID: <29OCT199219201330@utarlg.uta.edu> Date: 30 Oct 92 01:20:00 GMT Article-I.D.: utarlg.29OCT199219201330 References: <1992Oct28.154838@orion.IntelliCorp.COM> <1992Oct29.144748.7474@msc.cornell.edu> <73015@hydra.gatech.EDU> Sender: news@utagraph.uta.edu (USENET News System) Followup-To: sci.materials Organization: The University of Texas at Arlington Lines: 14 News-Software: VAX/VMS VNEWS 1.41 Nntp-Posting-Host: utarlg.uta.edu