Edison's improved form of JW Trowbridge's electric dynamometer. 'Scientific American' New York 1879

---

Size: 6000px × 4684px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1879, american, archival, archive, dynamometer., edison, electric, electricity, form, historical, history, improved, instrument, jw, measurement, scientific, trowbridge, york