Hidden Flaws Bared by High Speed Movies (Dec, 1938)
Making a high-speed movie has gotten a lot easier and cheaper in the digital age. There are some really cool ones on You Tube.


Hidden Flaws Bared by High Speed Movies
THE “movie doctor” is not human. It is a machine that in its own line can do more than any human being. It specializes in diagnoses, because with its keen, rapid-seeing eye, it can peer at machines, watch the way they work, and point out just what is the matter with them.
This movie doctor is an exceedingly high-speed motion-picture camera, now used in conjunction with a precision clock. It is really a sort of time microscope. In it is used the ordinary sixteen-millimeter moving-picture film, which takes pictures of the object under examination and at the same time records the time of each frame. While the ordinary motion-picture camera is designed to run at a rate of around sixteen pictures per second, this high-speed camera
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