Negus boasted that their Improved Taffrail Log was "the best ever manufactured." It features a swivel-bearing mount for the recording element that was designed by John S. Negus and intended to reduce the irregularities encountered in rough seas. Its large dial reads to 100, and an inset dial reads to 10. New, it cost $27. The U.S. Navy transferred this example to the Smithsonian in 1950. The rotator is missing.
Ref: J. S. Negus, "Ship’s Log," U.S. patent #481,241.
T. S. & J. D. Negus, Illustrated Catalogue and Price List of Nautical & Optical Instruments (New York, 1899).