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					|  |  | Used with permission of the United States Postal Service©.  All rights reserved. |  | Photo (detail):
							
							Bob Carlitz |  |  |  | 
				
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						| "Evolution of Corn" |  | 1938 |  | Ames Post Office |  | Mural, 
							
							
								oil on canvas |  | 18'2" x 5/9" |  | Program: Treasury Section of Fine Arts |  | Location: Lobby - north wall |  | Cleaned and restored in1987 |  |  |  |  |  
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