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... construction such as the mysterious Zeppelin-Parseval sky monster that, carrying a complement of twenty-live... and maintenance of twelve dirigibles of the Zeppelin type. So far as the knowledge of the rest of the world... extended from 100 to 1,400 kilometers. Secret trial trips of a fully equipped Zeppelin like X 15, carrying... of small craft so often quoted aB a possible counter-defense against the Zeppelin are overrated, according