64 REPORT OF NATIONAL MUSEUM, 1920. 



his important studies of the motion of animals, researches made under 

 the auspices of the University of Pennsylvania. These researches 

 developed the possibility of recording motion by the camera, leading 

 up to the wonderful development of recent years in moving pictures. 

 The apparatus was presented by the Commercial Museum of Phila- 

 delphia. 



History. — The division of history has remained, as during the 

 previous year, in charge of Mr. T. T. Belote, curator, the only change 

 in the staff being the promotion of Mr. Fred Kaske, skilled laborer, 

 to the rank of preparator. 



The accessions for the year are of very great importance and ex- 

 ceed those of the preceding year in number and in historic and 

 scientific value. Through the cooperation of the War Department 

 there were secured extensive collections illustrating the military ac- 

 tivities of the countries engaged in the war. The services represented 

 are : Air Service, Ordnance, Chemical Warfare, Quartermaster, Engi- 

 neer, and Signal Corps. The following may be mentioned : A collection 

 of military aeroplanes showing the principal types used by the United 

 States during the war, and captured German planes, lent by the Air 

 Service ; a very large and representative collection of ordnance equip- 

 ment of the type used by the armies of the United States and the allied 

 countries during the war, including field guns, machine guns, small 

 arms, sectionalized projectiles, adapters and boosters, tools and acces- 

 sories, and various other objects of military interest, lent by the Ord- 

 nance Department as were also a large and interesting collection of Ger- 

 man and Austrian field guns, howitzers, mortars, machine guns, and 

 miscellaneous enemy ordnance equipment, captured by the American 

 Expeditonary Forces in France, and a collection of rifles, pistols, and 

 swords illustrating the types of these weapons used during the war by 

 the several armies. A collection of projectiles and other offensive and 

 defensive equipment of the types used in chemical warfare was lent 

 by the Chemical Warfare Service ; and a collection of American engi- 

 neer materials illustrating the important part played in modern war- 

 fare by the Engineer Corps, lent by the Engineer Corps. From the 

 War Department Quartermaster Corps was received as a loan a most 

 varied and valuable collection of uniforms and of insignia showing 

 the types worn by the armies of the several countries, representing 

 uniforms worn by officers and enlisted men of the following countries : 

 Belgium, France, Great Britain, Italy, Japan, Austria, Germany, and 

 Turkey. 



The pictorial collections, deposited by the General Staff, include 

 nearly 500 drawings and paintings made by the official artists of the 

 American Expeditionary Forces in France in 1918. These pictures 

 afford a close up view of the war both at the front and behind the 

 lines. They are of great artistic and historical value and are the 



