The Maritime History of the Great Lakes
Detroit Advertiser and Tribune (Detroit, MI), Thur, 23 Aug, 1877

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A NEW SUB-MARINE ARMOR. - At Cleveland on Tuesday a new sub-marine armor was successfully tried. The body consists of Otis steel, while the limbs and helmet are of beaten copper, operating on ball and socket joints, overlaid with a coating of heavy rubber. The whole thing was, of course, water and air-tight. To the headpiece were two lines of rubber hose. One of these acted as an air supply pipe, and was attached to an air-force pump, while the other was to perform the double duty of carrying off the bad air which the diver had used, and also a telegraph wire connected to a telephone, through which our brave adventurer could tell of the wonders of the bottom. On touching the water, although it took five men to lift the armor, it contained so much air that it almost floated. The advantage claimed for this armor over the old rubber ones is that it relieves the operator from all pressure, either of air or water. Those of rubber cover only the head and shoulders, and have no escape pipe for the bad air. Thus the lower portion of the body is left exposed to the pressure of the water, which is very great below 30 or 40 feet, while a corresponding pressure is made on the interior of the helmet by the force pump in order to force the bad air out by a valve.

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Thur, 23 Aug, 1877
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Dave Swayze
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Public domain: Copyright has expired according to the applicable Canadian or American laws. No restrictions on use.
Maritime History of the Great Lakes
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Detroit Advertiser and Tribune (Detroit, MI), Thur, 23 Aug, 1877