A Treatise on Electricity: In Theory and Practice, Volume 1

able according acquired action angle apparatus arranged attraction axis ball becomes bismuth bodies cause centre charged circuit cloth communication conducting conductor consequently contrary copper crystals cylinder determine developed deviation diameter direction disc discharge distance Edition effect electric current electricity electrised electro-magnet employed ends equal established exercised existing experiment extremity fact fixed follows force former give given glass greater helix horizontal inches increase induced currents influence insulating intensity interior iron latter length less liquid magnetic magnetised manner means mercury metal movable movement moving mutual namely nature necessary needle negative observed obtained occurs parallel particles pass phenomena pile placed plane plate polarisation poles position possessed present produced quantity regard relation remains remarkable repulsion respect rotation separated similar situated soft iron steel substance surface touched traversed turn vertical vols wire