Page:Popular Science Monthly Volume 91.djvu/101

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Popular Science Monthly


���Channel and the North Sea, and while their sea-keeping qualities are excellent, never- theless they do not carry enough food and fuel to last more than ten days. On the other hand, however, a boat of this size painted gray is invisible at a distance of more than three miles, so that it is often possible to catch the submersible unawares. The boats are intended for offensive opera- tions almost entirely, though of course they would make good convoys near the coast.

The British have discovered that fighting the submarines is a question first of all of endurance. A larger chaser would be more comfortable, of course, but by no means so dangerous to the submarine.

��covered eight miles. End to end they would form a chain nearly twenty-five miles long

for England were motor-boats in the ordinary sense. They were really yachts. The interior design from bow to stern was as follows:

Chain locker, lavatory for crew forecastle for eight men, am- munition room, large fuel tanks, engine room, gal- ley, mess room, office state room for two and additional tank capacity in the ex- treme rear. On deck there was a platform forward for a three-inch gun. Behind this was the chart house, and further back still the bridge where the steering apparatus and engine telegraph were located.

One feature of this boat is an arrange- ment by which the steering lines are laid along the side of the deck from the wheel, making them easily accessible for repairs.

The chasers were designed for service in the English

��The buoyancy of you from sinking

��A Board Which Will Help You Learn to Swim

A SWIMMING board invented by William H. Roberts, of Newburyport, Massachusetts, is a help in learning how to swim.

The device is nothing more than two warp-proof boards of pine which are fastened together at a very large angle. The swimmer straddles these at the narrow junction of the boards. Lying with his body flat upon the front board and resting more or less upon the saddle board, he is buoyed up in the natural position for swimming. He learns the leg strokes first and then the arm strokes, and he rests back upon the boards whenever he becomes tired. By keeping his legs going slightly, the board is kept from overturning.

The buoyancy of the boards helps him to ride the waves and contrib- utes to his enjoy- ment. Since there is no danger to fear, confidence is soon gained and the swimming strokes are mastered in short order. The swimming board the boards prevents » used purely for

below shoulder level Sport, also.

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