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

F. J. Evans, A. Smith
1865 Philosophical Transactions of the Royal Society of London  
doi:10.1098/rstl.1865.0005 fatcat:suhbrm2oubcn3dfonvprspdbkq