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Kitty tortillas! <[log in to unmask]>
Date:
Tue, 26 Aug 2003 09:29:05 -0400
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"So have you heard the one about old window glass being thicker at the
bottom edge because glass is actually a liquid affected by gravity?
True or nutso?"

I've heard that before, but I was generally under the impression that window glass was thicker on one side than the other because of the way it was processed. Cones of glass were rolled out in a circular pattern-- the glass on the edge rolled thinner than the glass in the center; thus, early window glass tends to be thicker on one side than the other.

This seemed borne out by the marks in the glass where I used to work (c. 1750 farmhouse). All the early glass was rippled in slightly curved waves.

-Heidi

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