Hirtz compass for locating bullets in surgery.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg
More: https://en.wikipedia.org/wiki/Hirtz_compass
Previously:
1500s bullet extractor - photo
1923 bulletproof vest test - photo
3D-printed bullet feeder - GIF
Fired bullet shape comparisons - photo
.38 caliber bullet shatters on hitting Prince Rupert's drop - GIF
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