Science: German Blueprint

The Treaty of Versailles forbids Germany to possess submarines or war planes. Herr Hitler has tacitly admitted possession of an air force (TIME, March 4). Last week the naval correspondent of London's carefully conservative Morning Post did not say that Germany has any actual submarines, but he did affirm that she has an excellent new type of undersea boat on drafting boards and in the brains of capable designers. Special advantage of this blueprint craft is that it needs no storage batteries for submerged propulsion.

Operation of this theoretical submarine depends on a fact...

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