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In addition to work of this sort and services including scores of specialized activities, such as medical development, ordnance and munitions manufacture, building of yards, docks, and all sorts of accessory facilities, the navy before the war had been a month under way had given contracts for the construction of several hundred submarine-chasers, having a length of 110 feet and driven by three 220-horse-power gasoline-engines, to thirty-one private firms and six navy-yards.
The Japanese ships had at first feared an attack by the two little submarines Shark and Porpoise stationed at Cavite; they learned from their spies on land, however, that the government shipyards at Cavite had tried in vain to render the little boats seaworthy: they returned from each diving-trial with defective gasoline-engines.
Then for three days the two craft lay together, while the engineer and the men familiarized themselves with her internal economy the torpedo-tubes, gasoline-engines, storage-batteries, and motors; and the vast system of pipes, valves, and wires that gave life and action to the boat and while Metcalf experimented with the mysterious searchlight attached to the periscope tube invented by himself, but perfected by others.
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