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Water from a natural stream is viewed under a microscope, revealing a myriad of toxins and bacteria that could be eliminated by various purification methods during the 1940s. (1940s)

R

By Rick Ray

  • Stock footage ID: 19895044
Video clip length: 00:39FPS: 29.41Aspect ratio: 3:2
SD$65720 × 480MOV29.7 MB
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