opment of the principle in sea-going ships.
Plates of sufficient thickness to afford protection when placed vertically could not be made; but in 1874 it was applied in England.
The following description of the Inflexible is from Chief-Engineer J. W. King's War Ships and Navies of the World.
The Inflexible, which was commenced at Portsmouth dock-yard in February, 1874, and launched April, 1876, is a twin-screw, double-turret ship, with a central armored citadel.
She was designed by Mr. Barnaby, the Director of Naval Construction at the Admiralty, and at a meeting of the Institution of Naval Architects in London, he describes the vessel in the following language:
Imagine a floating castle 110 feet long and 75 feet wide, rising 10 feet out of water, and having above that again two round turrets planted diagonally at its opposite corners.
Imagine this castle and its turrets to be heavily plated with armor, and that each turret has two guns of about eighty tons each.