4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 62 



supplied by the Motorluftschiff-Studiengesellschaft. Its available 

 income is said to be $7,000 a year. The enterprise was inaugurated 

 on a small scale because of the uncertainty, at that date, as to the 

 practical value of such an establishment. The work of this labora- 

 tory, as in Eififel's, has been practically limited to wind-tunnel experi- 

 ments, though Prof. Prandtl has written some valuable theoretical 

 investigations, and is reported to be undertaking large-scale experi- 

 ments in the open air by use of a car on a level track, as at St. Cyr. 



The Deutsche J'ersuelisaiistalt fiir Litftfahrt cit Adlershof has 

 been recently founded by the \*erein Deutscher Ingeniure. The 

 laboratory adjoins the great Flugplatz, with its two square kilometer 

 flying field surrounded by numerous air craft factories, scores of 

 hangars, an aero club house and a grand stand. Major Von Tschudi, 

 a retired German officer, is general manager of the organization, 

 which operates the flying field in the interest of all aero manufac- 

 turers and experimentalists, whether civilian or governmental. Dr. 

 Eng. F. Bendeman is director of the laboratory and has ten assist- 

 ants, comprising, among others, Dr. Fuhrman, who was formerly 

 assistant in the Gottingen laboratory. I have not ascertained the 

 financial resources of the laboratory : but a prelude to its present 

 operations was a competition, involving some three score German 

 aeronautical motors, for the Kaiser Prize and additional contri1:»utions 

 from the country at large, aggregating in all 125,000 marks. It is 

 understood that the laboratory is liberally supported, is unlimited in 

 the scope of its work, and will conduct both indoor researches and 

 field experiments similar to those at St. Cyr. 



After this general view, a technical account of the foregoing 

 aeronautical establishments may be useful. 



BUILDINGS. EQUIPMENT AND OPERATION 

 ENGLISH AERONAUTICAL LABORATORIES 



Aeronautical laboratories used by the British government. — Of 

 the various aerotechnical plants supervised or used by the British 

 Advisory Committee for Aeronautics, we visited the one at the 

 National Physical Laboratory, at Teddington. and the one at the 

 Royal Air Craft Factory, at Farnborough ; but not the meteorological 

 stations, nor the plants of private concerns working for the com- 

 mittee, such as Vickers Sons and Maxim. 



The National Physical Laboratory, which corresponds to the 

 U. S. Bureau of Standards, is under the directorship of Dr. R. T. 

 Glazebrook, ¥. R. S., Chairman of the Advisorv Committee for 



