Figure 25. Martin A. Mason and William Heiron, 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. 



Figure 26. Grading in preparation for the BEB's new 635-foot wave tank, 24 August 1949. 



53 



