Pillsbury marine current meter modified by the Admiralty Hydrographic Office, United Kingdom, 1896-1897. Used to measure the water velocity or current in a stream, river, or ocean. Pillsbury Marine Current Meter, 1896-97 1896-1897
Revy current meter, by Elliott Brothers, London, 1873-76 (see other part record - 1923-524 Pt2). Revy's Water Current Meter, 1873-1876 1873-1876
