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1950s: A professor demonstrates how to test if silver is part of a chemical substance in 1952.

R

By Rick Ray

  • Stock footage ID: 26866606
Clip length: 00:46FPS: 29.97Aspect ratio: 16:9
HD$791920 × 1080MOV382.4 MB
SD$65852 × 480MOV36.1 MB
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