nted its being adopted in any except a few pump fixed in it, by which any leakage beneath the deck very large steam vessels in the Royal Navy. It stops the can be pumped out when afloat. The extra buoyancy is ob- way of the ship at slow speeds, and is uncertain in its action tained entirely by… … derable hight above the water ; it is then floating on two when seen fitted to the vessel; and the ease with GUMPEL’'S RUDDER. points, with the ballast far above the center of buoyancy, which it could be worked, although the steering thus forming an unstable equilibrium. In this position the boats,…
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