The gear works is equipped throughout with automatic machines built on the Maag patents. His cog-wheel involves a new principle, giving utmost safety and freedom from wear and noise. Specially designed testing machines are used, guaranteeing precision of the gear wheels. [PLATE 37: “DELAG” Zeppelin Route Chart, 1912-13.] During the war the company made all the gearing on the Zeppelins and airplanes. The factory is now operating at full capacity, employing 500 men, making motor car gears, transmissions, etc. The manager is Dipl. Ing. Count von Soden. The Hangar Construction Company Back in 1913 a subsidiary was founded, first as a consulting engineering concern; but soon thereafter it became the Zeppelin Hangar Construction Company (Zeppelin Hallenbau G.M.B.H.). Through long practical experience it is prepared to build and equip complete airship harbors and dock yards, prepare landing fields and airdromes. One of the principal developments with which it has been accredited is the rotary shed, single or double. It has erected special workshops, gas plants and all the accessories of a modern flying terminal. The company designed and constructed the two modern sheds at Friedrichshafen, the entire Staaken plant, the “DELAG” airship harbors and nearly all the other airports in Germany. Many hangars and workshops in Germany today were put up by the company using specially patented construction methods. In all some twenty-four complete airship harbors have been built from start to finish by this organization, which is under the management of Mr. Milatz and his staff of experts varying between 20 and a hundred members. Zeppelin Production of Airplanes In 1916, the airship building personnel conducted experiments with airplanes made of airship duralumin girders covered with fabric. The object was to secure a plane which would meet the technical requirements of aerial photography. Though their activities were devoted to the airship building programme, the engineers managed to produce an experimental machine of that type. On its first trials, it proved so superior to existing types that the army urgently requested early delivery of a number of machines. There was little time to do the work, however, and at the end of the war only twenty had been completed. They were destroyed, afterward, under the terms of the Versailles treaty. [PLATE 38: “DELAG” Passenger Zeppelin “Bodensee”.] There were other airplane enterprises organized by Count Zeppelin, which remain today leaders in their respective fields. Zeppelin was the first person to conceive of the giant all-metal flying boats (Plates 21 and 22), and all-metal airplanes. The Zeppelin-Dornier Metal Monoplanes