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1950s: A professor conducts litmus experiments with acids and chemical bases, and shows their practical applications in 1952.


By Rick Ray

  • Stock footage ID: 26866483
Video clip length: 01:17FPS: 29.97Aspect ratio: 16:9Editorial use only. Learn more
HD$791920 × 1080MOV573.9 MB
SD$65852 × 480MOV56.4 MB

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