Contributions from 

 The Museum of History and Technology: 



Paper 38 



The Earliest Electromagni nc Instruments 



Robert A. Chipman 



ELECTROSTATIC INSTRUMENTS BEFORE IKOO 123 



INSTRUMENTING VOLTAIC OR GALVANH ELECTRICITY; [800 1820 124 



ELECTRICAL INSTRUMENTATION, 1800-1820 125 



OERSTEDS DISCOVERY 126 



BEGINNINGS OF ELECTROMAGNETIC INSTR1 MENTATION 126 



CHRONOLOGY AND PRIORITY 127 



ORIGINAL ELECTROMAGNETIC MULTIPLIERS 129 



CONCLUSIONS 135 



\i KNOWL1 DGMEN fS 136 



