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Lec 25 - Spruing, Investing and Casting Gold

"Lec 25 - Spruing, Investing and Casting Gold" Demonstrates the technique of spruing, investing and casting gold via the thermal expanding technique. Orig. air date: AUG 25 75 This is part of the Open.Michigan collection at: http://open.umich.edu/education

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This video is a part of a lecture series from of michigan