120 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1915. 



Oregon, Oklahoma, and Texas. In some cases these remnant groups 

 are represented by only one or two survivors who speak their native 

 language, hence the very last opportunity of gaining authentic in- 

 formation regarding them has been embraced. In other directions 

 also the bureau's activities are being vigorously pursued and several 

 volumes will soon be published. 



ADDITIONAL LAND FOR NATIONAL ZOOLOGICAL PARK. 



Since the statement at the last meeting of the board much delay 

 has been encountered in the steps taken to acquire the land on Con- 

 necticut Avenue, for which Congress appropriated $107,200 by the 

 act of June 23, 1913, but it is now understood that the jury of con- 

 demnation has completed its work and will shortly present its find- 

 ings to the court. As previously stated, the land in question has a 

 frontage on Connecticut Avenue of 1,750 feet and covers about 10 

 acres, and when acquired will bring the park area to 180 acres. 



THE LANGLEY AERODYNAMICAL LABORATORY. 



The first year's work of the Langley Aerodynamical Laboratory, 

 reopened by authorization of the Board of Regents in May, 1913, was 

 to organize an advisory committee, arrange a comprehensive program 

 of operations, devise waj^s and means of carrying on investigations 

 and publishing reports, conduct such active experiments as were pos- 

 sible with the means immediately available, and secure and arrange 

 in the library all available aeronautical literature. 



The reports of the committee thus far ]Dublished have apj^eared as 

 individual papers in the| Smithsonian Miscellaneous Collections. 

 The first of these recounts the organization of the advisory commit- 

 tee and the resources of the Langley Laborator3^ The first technical 

 publication sets forth the results of experiments made at the model 

 tank at the Washington Navy Yard. Another report describes the 

 organization and equipment of the leading aeronautical laboratories 

 of England, France, and Germany. Some of the reports of the com- 

 mittee are as yet confidential or incomplete, such as Hammond's re- 

 port on Avireless communications to and from air craft. 



The members of the various committees of the Langley Laboratory 

 have been active in aerodynamics and allied subjects. Xaval Con- 

 structor Hunsaker has completed the installation and equipment of 

 the aerotechnical laboratory at the Massachusetts Institute of Tech- 

 nology and has sent the Smithsonian the results of the first researches 

 for publication. Mr. Buckingham has completed and published a 

 masterly paper on the mathematical princijile governing the relations 

 of experimental models of all sorts to those of full-scale machines. 

 Dr. Humphreys has published a long paper on the physics of the 



