Tits Submarine in War and Peace, By Simon Lake. (Phila-
delphia : Lippincott. $3.)—The well-known American sub- marine-builder recalls in this readable book his early experiences in perfecting his invention and persuading naval authorities to take it up. He describes, too, various older projects and per- formances, including the development of the rival Holland type of submarine. Mr. Lake speaks with authority on submarine construction, but his remarks on submarine warfare have not been borne out by events. He did not expect that we should overcome the submarine menace, and he underestimated the success of the new teethe and devices employed by the Navy. He says repeatedly that submarines cannot fight submarines, whereas British submarines have sunk a fair number of ` U '- boata. He questions the value of the convoy system, though it has in feet proved most successful. He exaggerates the power of the submarine as a weapon of war, as is perhaps natural in an inventor,