Submarine cable laying and repairing
A 1908 technical manual by Henry Daniel Wilkinson, published in London and New York, explaining how submarine telegraph cables are laid and repaired at sea. Its pictures are line diagrams of cable-laying gear such as a sheave on a ship's side with a buoy, a ratchet wheel and brake on a winch shaft, and a plunger-and-trigger sounding weight with detachable weights and sounding tubes. A designer could draw on their clean, labelled mechanical drawing style, with simple linework, stippled sea areas and wide cream backgrounds.
