Assertion: galvanometer's deflection | /r/HasProperty | described by hans oersted
Facets:
value: in 1820
type: TEMPORAL
Source sentences:
text: The deflection of a magnetic compass needle by current in a wire was first described by Hans Oersted in 1820.
text: The deflection of a magnetic compass needle by current in a wire was first described by Hans Oersted in 1820.