26 ANNUAL BEPOKT SMITHSONIAN INSTITUTION, 1916. 



The museum exhibits also included a series of objects illustrating 

 the development of six kinds of implements and appliances of the 

 arts — apparatus for fire making, the jackknife, the saw, the spindle, 

 the shuttle, and the ax. Pictures of othei- exhibits in biology, geol- 

 ogy, and anthropology in the National Museum were shown by a 

 " stereomotorgraph " machine. 



The Smithsonian Institution was awarded a grand prize, under 

 the head of scientific investigation, for the collective exhibit by the 

 Institution proper, the Bureau of American Ethnology, the Museum, 

 the Astrophysical Observatory, and the Bureau of International 

 Catalogue of Scientific Literature; a grand prize for the balloon 

 pyrheliometer designed and exhibited by the Astrophysical Observa- 

 tory ; a gold medal for the " Group of elk " shown by the Museum ; 

 and a silver medal for investigations for the betterment of social 

 and economic conditions. The balloon pyrheliometer, as its name 

 implies, is an instrument for measuring the heat of the sun. It is 

 carried aloft by a pair of rubber balloons until one of them bursts, 

 when it gradually descends to the earth, supported by the other. 

 Records have thus been obtained at heights of over 9 miles. 



PANAMA-CALIFORNIA EXPOSITION AT SAN DIEGO. 



Although no appropriation was made by Congress for exhibits 

 at San Diego in 1915, it was possible for the Institution, through 

 cooperation with the exposition authorities, to arrange an interesting 

 exhibit of physical anthropology and one illustrating American 

 aboriginal industries. These exhibits were described in my report 

 of last year. 



At the close of the San Francisco Exposition a number of the 

 Smithsonian exhibits were transferred to San Diego, this fair having 

 been extended over another year. These exhibits were located in the 

 Science of Man Building, and included four large cases containing 

 the family groups of natives from different quarters of the globe, as 

 described above, and some cases containing specimens of their arts 

 and industries, together with several small family dwelling groups. 



NATIONAL MUSEUM. 



The report of Assistant Secretary Rathbun, appended hereto, re- 

 views in detail the operations of the National Museum. The total 

 number of new specimens acquired was 243,733 ; about one-half per- 

 tained to the department of zoology, about one-third were botanical 

 and paleontological, and the rest were additions to the anthropo- 

 logical and other collections. Among the ethnological additions 

 of special interest may be noted a series of costumes, weapons, 

 and utensils from British Guiana; many objects from Celebes, 



