CONTENTS 

 FIGURES-Continued 



Page 



14 Completed building housing the new 85-foot wave tank of the BEB 30 



15 Another view of the building housing the BEB's 85-foot wave tank 



shortly after completion 30 



16 Jim Mason and Frank Erwin laying brick foundation for tlie first addition to 



the BEB laboratory building 41 



17 Walls going up on the addition to the BEB's facility on Dalecarlia Reservation, 



Washington, D.C., winter, 1939-40 41 



18 Officeandlaboratory of the BEB, Washington, D.C., 17 May 1940 42 



19 Another view of the office and laboratory of the BEB 42 



20 BEB office and laboratory some time later 42 



21 Jay V. Hall, Jr., involved in research work during World War II, using the 



BEB's 85-foot wave tank 46 



22 Martin A. Mason working on a wave experiment during World War II, using 



the BEB's 42-foot wave tank 46 



23 Jim Mason, Leroy Harris, and Gen. Kingman working on an experiment in 



the BEB's 85-foot wave tank, August 1943 47 



24 Gen. John Kingman, Martin A. Mason, and William C. Krumbein studying a 



map in connection with the BEB's intelligence work during World War 11 ... . 47 



25 Martin A. Mason and William Herron, Jr., looking over site for the BEB's 



proposed 635-foot-long wave tank at the agency's facility on the Dalecarlia 

 Reservation, Washington, D.C., 8 July 1949 53 



26 Grading for the BEB's new 635-foot-long wave tank, 24 August 1949 53 



27 Pouring concrete for the bed of the 635-foot wave tank, 30 September 1949 . . 54 



28 Sides of the 635-foot tank beginning to take shape, 5 November 1949 54 



29 View looking down the 20-foot-deep, 635-foot-long tank toward area where 



generator will be located 55 



30 Another view of construction of BEB research facilities, 10 January 1950 .... 55 



31 Completed large wave tank but without generator 56 



32 Installation of small, portable wave generator used in the BEB's 635-foot-long 



wave tank during interim period of the early 1950's before the large generator 



was secured 56 



33 Large wave generator on the BEB's 635-foot wave tank 57 



