Rotating Vane, Mechanical log consisting of a fence log in a box and two log fins, one of which must be attached with a log line on the reverse, the second log serves as a reserve. The log fins are cylindrical floats with three helical wings, which drive the stern log in the clockwise direction. The round stern log has three enamel dials, for 1 mile (subdivided into sixteenths), 10 miles and 100 miles. [combined description], I. Thyssen, Rotterdam, c. 1860, brass (alloy), copper (metal), iron (metal), l cm

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Rotating Vane, Mechanical log consisting of a fence log in a box and two log fins, one of which must be attached with a log line on the reverse, the second log serves as a reserve. The log fins are cylindrical floats with three helical wings, which drive the stern log in the clockwise direction. The round stern log has three enamel dials, for 1 mile (subdivided into sixteenths), 10 miles and 100 miles. [combined description], I. Thyssen, Rotterdam, c. 1860, brass (alloy), copper (metal), iron (metal), l cm

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Keywords: 1, 8, 10, 40, 100, 1860, alloy, attached, box, brass, clockwise, cm, consisting, copper, cylindrical, dials, direction, drive, enamel, fence, fins, floats, helical, iron, line, log, mechanical, metal, mile, miles, reserve, reverse, rotating, rotterdam, serves, sixteenths, stern, subdivided, thyssen, vane, wings