Smithsonian Report, 1918. — Leffmann. 



Plate 3. 



The Quarter-Size Model Flying Over the Potomac River on August 8, 



1 903. 



This machine was built in 1900-1901, principally to test certain features of balancing, etc., for the large 

 machine, and flights were first made with this model as early as June, 1901. 



