60 REPORT OF NATIONAL MUSEUM, 1919. 



tion, which illustrates iiumy different phases of the world conflict 

 and includes the following classes of matter: Air Service, military 

 and naval equipment, battlefield relics and trophies, and military 

 and naval uniforms and insignia. 



Among the objects received in this connection the following are 

 the most notable: From the United States Air Service, the first De 

 Haviland-4 battleplane built in America, which was completed by 

 the Daj^on-Wright Airplane Co., October, 1917, and installed with 

 the first 12-cylinder Liberty engine. This airplane was flown for over 

 1,000 hours, including trips from Dayton to Indianapolis, Detroit, 

 Akron, Pittsburgh, Cleveland, New York, Philadelphia, and Wash- 

 ington, chiefly by Howard Kinehart, and has carried Orville Wright, 

 Glenn Martin, and others of national reputation. It was used as a 

 model by the Dayton-Wright Co. and other makers, and is fully 

 equipped with guns, bombs, camera, radio apparatus, and other ac- 

 cessories; a training plane of the Curtis JN4-D type, used at all 

 United States fields for primary instruction of aviators, 1918; the 

 fuselage of a De Haviland-4 military airplane equipped with two 

 Lewis aircraft machine guns on double yoke, and two Marlin 

 aircraft machine guns, and other accessories; a Voisin military 

 airplane for bombing at night and a Caudron airplane for photo- 

 graphing and reconnoitering, both used by the French on the west- 

 ern front during the European War, are of special interest as the 

 first notable relics of aerial warfare to be received by the Museum. 

 From the Air Service was also received a number of other interest- 

 ing exhibits consisting of aerial accessories and including an avi- 

 ator's fur-lined flying suit equipped with an electric harness which 

 may be attached to batteries for extra warmth. 



From the Ordnance Department was received a very complete 

 exhibit relating to the activities of that department, including a 

 6-ton special tractor military tank, model of 1917. This tank is 

 of the armored 2-man type equipped with a 37-millimeter gun. It 

 is driven by a 4-cylinder gasoline engine which imparts the drive 

 through a transmission gearset and reduction gearing to a track- 

 laying or crawler traction mechanism. The main structure of the 

 body is made up of six-tenths-inch armor plates capable of with- 

 standing machine gun or rifle fire ; a Browning machine gun, water 

 cooled, model of 1917, with a belt filling machine, water boxes, 

 filling cup, steam condensing device, cleaning rod, ammunition boxes 

 and leather fillers, ammunition belts, flash hider, and a hand carry- 

 ing case with small accessories; a Browning machine rifle with spare 

 parts and accessories, model of 1918; a battery commander's tele- 

 scope, with accessories, one of the most important instruments used 

 in the control and observation of field artillery fire; a battery com- 



