Papers of the Board of Longitude

Correspondents with, among others, D. Riz, E. Fergusson, H.C. Jennings, E. Fairfax, R. Raines Baines, J. Bamber, A. Hodge, Captain Bingham, T. Cook, S. Leguin, F. Higginson and J. Vetter, and related papers. The subjects covered include a perpetual log; ascertaining the rate of a ship in a current; sounding machines; ship's logs; a machine for measuring currents. Massey's sea log and sounding machine; P. Burt's buoy and nipper; J. Tyson's method of finding a ship's course at sea; an instrument for measuring the force and direction of the current; a new chronometer; various inventions; the deep sea lead; a sea perambulator; a perpetual log; finding longitude by deep soundings; a machine to measure the course of a ship and the strength of the current; a machine to solve spherical triangles; a report on a machine for measuring currents; the influence of the current on the motion of ships; finding latitude and longitude by dead reckoning, and a new log for this purpose; and a machine for measuring currents.