4 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1937 



logical excavations at the Lindenmeier site in Colorado, adding im- 

 portant material to that which ho had already discovered relating 

 to Folsom man. In March 1937 he represented the United States 

 at the International Conference of Archeologists at Cairo, Egypt. 

 Dr. Strong devoted the year to completing the report on his archeo- 

 logical expedition of the previous year to Honduras. Dr. Steward 

 continued ethnological studies of the Shoshonean tribes of the Great 

 Basin and Plateau areas. Mr. Hewitt continued his researches on 

 the League of the Iroquois. The Bureau published its annual report 

 and one bulletin. 



International exchanges. — Since the conclusion at Brussels in 1886 

 of two exchange conventions between the United States and a number 

 of other countries, the Smithsonian Institution has been charged by 

 Congress with the important duty of carrying on the exchange 

 with otlier countries of governmental and scientific documents on 

 behalf of the United States. During the year the exchange service 

 handled a total of 657.346 packages weighing 651,461 pounds. The 

 number of full and partial sets of governmental publications for- 

 warded abroad is now 111, and 105 copies of the Congressional Rec- 

 ord and the Federal Register are sent to other countries in exchange 

 for their parliamentary journals. Four new depositories in Swit- 

 zerland were added to the interparliamentary exchange list, and 

 one in Germany, the Bibliothek des Preussischen Landtags, Berlin, 

 was discontinued, as the Lantags was abolished. 



National Zoological Park. — The fiscal year 1937 was outstanding 

 in the history of the Zoo. The construction under the P. W. A. grant 

 of $892,920 of five new buildings was completed. Under this same 

 grant, three 250-horsepower down-draft boilers were installed in the 

 central heating plant, the conduit system was extended to two mam- 

 mal houses, and the electric supply distribution system was rear- 

 ranged. An expedition headed by Dr. William M. Mann, Director 

 of the Zoo, and financed by the National Geographic Society left 

 Washington in January to collect animals in the Far East for the 

 Zoo. They took with them 28 animals which were intended for zoos 

 in the regions visited. The expedition is expected to return to 

 Washington in October with a large collection of rare animals, ad- 

 vance reports indicating that the trip has been a very successful one. 

 Accessions of animals during the year numbered 1,067. Losses by 

 death and otherwise totaled 916, leaving the collection at the close of 

 the year at 2.342 animals, representing 701 different species. Visitors 

 numbered 2,435,520, including groups from 638 schools and organiza- 

 tions from 20 States and the District of Columbia. 



Astrophysfcal Observatory. — Measurements of the solar constant of 

 radiation have been continued on all favorable days (amounting to 

 about 80 percent of all days) at the three Smithsonian observing sta- 



