🚀 go-pugleaf

This is posted for my wife, who doesn't have NNTP access.  Please email
comments to woyansky@ltd.dnet.ge.com.  Thanks.

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>   2) Does glass "flow" or "settle". producing waviness and thicker areas
>      at the bottom of a pane?
 

I remember doing a calculation in one of my first materials courses at NU
about the subject of "flowing" glass and if I remember correctly it would
take tens of thousands or maybe millions of years to see an effect of thicker
glass at the bottom of a window pane.  

Interesting note-- many old churches with large stained-glass panes are
thicker on the bottom than at the top.  They were actually made this
way intentially so that the bottom of the pane could support the weight of
the glass.  This may be where some of the folklore comes from. 


Jeannine Woyansky
Materials Engineer, GE Lighting  Cleveland, Ohio
woyansky@ltd.dnet.ge.com