"> Contributions from
The Museum of History and Technology:
Paper 38
The Earliest Electromagnetic Instruments

Robert A. Chipman

[ELECTROSTATIC INSTRUMENTS BEFORE 1800]123
[INSTRUMENTING VOLTAIC OR GALVANIC ELECTRICITY, 1800-1820]124
[ELECTRICAL INSTRUMENTATION, 1800-1820]125
[OERSTED’S DISCOVERY]126
[BEGINNINGS OF ELECTROMAGNETIC INSTRUMENTATION]126
[CHRONOLOGY AND PRIORITY]127
[ORIGINAL ELECTROMAGNETIC MULTIPLIERS]129
[CONCLUSIONS]135
[ACKNOWLEDGMENTS]136
[INDEX]

Figure 1.—Models of various electromagnetic instruments created by Schweigger, Poggendorf and Cumming in 1821, made for an exhibit in the Museum of History and Technology, Smithsonian Institution. (Smithsonian photo 49493.)

Robert A. Chipman