![](http://www.alamy.com/thumbs/6/EF049552-9DC2-4D7D-ABA9-006B6BF3AC2B/AHPHWF.jpg)
Physicist Joseph J Thomson studying radioactivity. Hand-colored halftone of an illustration
Hand-colored halftone reproduction of an illustration
Size: 4080px × 2910px
Photo credit: © North Wind Picture Archives / Alamy / Afripics
License: Licensed
Model Released: No
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