Thread: How long to tell if glass is not compatible?
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Old 2018-07-25, 7:48pm
Trish915 Trish915 is offline
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Join Date: Jun 26, 2013
Location: Roanoke, Va
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Quote:
Originally Posted by Three Muses Glass View Post
You can make a cheap polariscope. Here's one how-to
http://www.davebross.com/GlassTech/polariscope.html
Interesting! Thank you!
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