40 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



tected in the whole series ; it was not indicated by comparison with the 

 Quincy values, as there is close agreement with either value of the 

 horizontal angle, but the spiral showed that the horizontal angle must 

 be in error by about 10°, and a sextant observation at almost the same 

 instant corroborates the value of the height given in the table. 



TABLE V. 



Flight of Gr ah ame- White, Sept. 12, 1910. Farman Biplane, Base Line 

 6236 feet, Course 13 feet above Mean Low Water. 



It has been thought worth while to give these observations in detail 

 for those especially interested in the problem. It is evident that there 

 is much information in the tables and curves to which we have not 



