Smithsonian Report. 1936. — Baisley 



Plate 1 1 



Phutogriiph l^ S. Army .\ir Corps. 



1. Mosaic Maps of Washington and Vicinity, 36 Miles in Diameter. 



Approximately 900 aerial photographs, size 7 by 9 inches, were used in the making of this map. This map 

 measured approximately 8 feet in diameter, and was prepared at a scale of 1 to 2.5,000. 



Photograph U. S. Army Air Corps. 



2. Picture Taken With T-3A Camera. 



The center part of the picture is a contact print and the four keystone-shaped prints surrounding it are 

 printed in the T-3A transforming printer shown in plate 6, figure 2. 



