Luther Alvord's endless-chain propeller, 1876

Jacob Eckhardt's vessel propulsion system, 1876

F. S. Allen's hand windlass, 1876

F. S. Allen's hand windlass, 1876

Henry William's 1877 feathering paddle-wheel

James Davies's 1877 steering apparatus

John E. Massey's patent ship's log, 1878

John Gates's 1878 steering apparatus

William Thomson's deep-sea sounding apparatus, 1878

William Thomson's compensating binnacle, 1878

Tremberger and Stein's life boat, 1879

William Barker's fog signal, 1879

Webb's paint sample, 1879

William Thomson's 1880 compass