Traded from 20 Cross Street, Hatton Gardens, London, and later 45 & 47 Lofting Road, Liverpool Road, London. Registered office: 63 Barnsbury Street, London. Manufacturers of Thomson's (Lord Kelvin) 'First Tide Predicting Machine', 1876, the 'Self-Recording Tide Guage' and the 'Improved Self-Recording Tide or Water Level'. Contractors to the Admiralty, War Office, Board of Trade, India and Colonial Offices.