NO. 3 SMITHSONIAN EXPLORATIONS, IQI5 115 
Short flights were made from the ice. On March 10, after a 
stationary propeller test on the ice showing a thrust of less than 300 
pounds, the aeroplane was headed down the lake against a wind of 
Fic. 139.—The Column of Progress at the Panama-Pacific Exposition, 1915. 
Photograph by Walcott. 
six miles per hour for a trial flight. She ran over the lake at fair 
speed with but four cylinders working. The poise on the ice was 
steady. After a short run the rear skate arose clear of the ice; then 
the front skates of the machine were sustained in the air for some 75 
feet, as shown by the measured breaks in the traces on the ice. The 
