Title
Edison's improved form of JW Trowbridge's electric dynamometer
Caption
Edison's improved form of JW Trowbridge's electric dynamometer. "Scientific American" New York 1879
Date
1879
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP07104_460001341
License type
Rights managed
Available size
28,0Mb (2,2Mb) / 11,8in x 9,2in / 3543 x 2766 (300dpi)