Original Papers by the Late John Hopkinson, Volume 1

actual alternating amount ampères apparatus applied armature arranged assumed brushes capacity cent charge circuit coils column comparatively complete conductors connected considerable constant continuous copper core cost curve deflection depends determined difference difference of potential diminish direction distance dynamo effect efficiency electric electromotive force energy Engineers equal equation excited experiments expressed fact field flashes galvanometer give given greater heat Hopkinson importance increase induction interest iron knowledge known lamp lead less light lighthouse loss machine magnetic magnetising force material mathematical means measured mechanical method minute motor observed obtained passing period placed plates position potential practical present produce properties proportional quantity regard relation represents resistance secondary shown speed supply Suppose Table taken temperature theory transformer unit varying Volts watts wire