SECRETARY’S REPORT Ix 
NATIONAL ZOOLOGICAL PARK 
Director.—Wiiu1aAM M. Mann. 
Assistant Director.—Ernest P. WALKER. 
Head Keeper.—F Rank O. Lowe. 
ASTROPHYSICAL OBSERVATORY 
Director.—Loyat B. ALDRICH. 
Assistant librarian.— Marjorie KuNzE. 
Division oF ASTROPHYSICAL RESEARCH: 
Chief.—Wi.ii1amM H. Hoover. 
Instrument makers.—ANDREW KRAMER, D. G. Tatsert, J. H. Harrison, 
Research associate-—CHARLES G, ABBOT. 
DIvIsION OF RADIATION AND ORGANISMS: ~ 
Chief —R. B. WirHrow. 
Plant physiologist (physicochemical). —LrONARD PRICE. 
Biological aid (botany).—Y. B. Ensrap. 
NATIONAL AIR MUSEUM 
Advisory Board: 
ALEXANDER WETMORE, Chairman. 
Mas. Gen. GRANDISON GARDNER, U.S. Air Force. 
Rear Ap. A. M. Prinz, U. S. Navy. 
Grover LOENING. 
WixuiaM B. Srovut. 
Assistant to the Secretary for the National Air Musewm.—Caru W. Mirman, 
Curator.—P. E. GARBER. 
Associate curators.—S. L. Brrers, R. C. Srrospet, W. M. Mates. 
Exhibits preparator.—S. L. Porter. 
CANAL ZONE BIOLOGICAL AREA 
Resident Manager.—Jamus ZETEK. 
