He organized a small group within the parent company, Luftschiffbau-Zeppelin, in 1912. It was the first concern exclusively engaged in all-metal airplane construction. Today the great plant of Dornier Metallbau G.M.B.H. at Seemoos, near Friedrichshafen is noted the world over for its remarkable development in heavier-than-air craft, which are named Dornier, after the manager and chief engineer. From the first Count Zeppelin placed at the disposal of Claude Dornier ample funds with which he was able to follow utterly new and original methods in developing all-metal planes on a strictly scientific basis. It had never been done before. The plant in six years developed from a small experimental workshop to one of the largest in the world. At Seemoos there are located a great hangar, office buildings, workshops, turntables, slips and other facilities for landing and withdrawing the huge Dornier flying boats. Another great factory was erected at Lindau in 1918 but has not been used for reasons of economy. [PLATE 39: The “DELAG” Passenger Zeppelin “Nordstern”, 1919. A sister ship of the “Bodensee.” The “DELAG” Passenger Zeppelin “Nordstern.” Interior view of the passenger cabin.] As progress was made in designing, constructing and testing metal planes, Dornier devoted the work practically toward perfection of internally braced monoplanes. The monoplane principle was maintained from the beginning. Today it is recognized generally as the most desirable type. New designs, methods of handling metal, experiments with various kinds of construction, newly invented machine tools, experimental planes and models, each an advance in efficiency, invariably something newly discovered in the infant science of aerodynamics—these were the activities of Dornier and his staff in six years. The results were Dornier’s all-metal planes, possessing from 55 to 2,400 horsepower. They had just started quantity production of big planes and flying boats in the factories at Lindau and Seemoos when the German revolution halted all activities. Since then, though hampered by the treaty stipulations, the company has developed a series of commercial types unexcelled in construction, performance and safe operation. Since the war both commercial land planes and flying boats powered with from one to three engines have been produced. Twenty-one Dornier Designs