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Dave Thomas | all galleries >> North Central PA >> Lewisburg Trip 2007 >> Northumberland, PA >> Dr. Joseph Priestly House > Burning Glass
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05-JUL-2007

Burning Glass

A holder for a magnifying lens that could be used to concentrate clean heat on test samples.

Canon PowerShot A80
1/100s f/3.5 at 13.6mm full exif

other sizes: small medium original auto