Plate, position of compasses in profiles of ships by unknown artist Plate XI containing seven diagrams showing the position of compasses in the profile of several ships. The diagrams were based off of the following Royal Navy ships: Warrior, Black Prince, Achilles, Defence, Resistance, Hector, Valiant, Royal Oak, Prince Consort Caledonia, Ocean, Enterprise, and Royal Sovereign. Subject: Engineering Published in Philosophical Transactions as 'On the magnetic character of the armour-plated ships of the Royal Navy, and on the effect on the compass of particular arrangements of iron in a ship'. Received by the Royal Society on 9 March 1865. Read 16 March 1865. [1865]