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By Goupil & Co., after the painting by Ridgeway Knight. Published by D. Appleton & Co.
Made in New York
- Image: 8.75 x 11 in.
Photogravure on wove paper
- Not on display
- Gift of Fisher Scientific International
- Fisher Collection
- FA 2000.001.176
- No known copyright restrictions
An older man leans on a cluttered workbench holding a mathematical compass. In the left background are two people seated and watching the inventor.