28 



REPORT ON 



In a few instances true bearings were obtained by observing the sun when its 

 apparent elevation above the horizon was equal to its diameter. In that case 



= 90 



and then 



cos A = 



sin 8 



COSlp 



i 



in which the azimuth will be north or south of the prime vertical according as the 

 sun's declination is north or south. 



Observations of the Sun, made October $ist, 1865, to determine the true tearing of the object used as 

 an azimuth mark in swinging the ship at Hampton Roads, Va. 



Observations of the Sun, made November i%ih, 1865, to determine the true bearing of the object used 

 as an azimuth mark in swinging the ship at St. Thomas, West Indies. 



True bearing of Peak 



S. 3' 35 



