Filings coherer, glass tube formed into T-shape at one end and bent round into U-shape at other end with bulb, 1899 1899
Filings coherer, small glass tube with bulb at one end and cap of red sealing wax at other end, 1898 1898
Replica of Liverpool & Manchester Railway 1st Class carriage 'Traveller' 1930 (replica); 1834 (original)
Pole pieces for same magnet altering to annular gap approximately 3 7/8" to 3 5/16", part of Oliver Lodge’s microphone amplifier or relay, 1898 (British patent 9712 of 1898) ), a precursor of the moving-coil loudspeaker Pole pieces for same magnet altering to annular gap, 1898 1898