216 Cincinnati Society of Natural History. 



EXAMPLE. 



On the 5tli of December, 1878, Mr. Howe by sweeping brought Po- 

 laris into tlie field of a Buff and Berger transit, and observed in both 

 positions of the horizontal axis. The resulting clock times, and the 

 scheme of computation are given below. From a Pegasi and % Andro 

 mediB, we have 



^ = :]9o,8'20" 

 log n, = 8.20291 

 wij = -|- 2" 58''-56. 



LAMP EAST. LAMP AVEST. 



Name of Star, jtt Pegasi. oAudromedse. a Pegasi. ^Audromedse. 

 d 23° 57' 59" 41° 40' 50" 14° 33' 27" 45° 48' 27" 



Time ofTransit 22'^ 46"^ 7^-66 22"^ 56" 40^-93 23'' I"" 23^-19 23'' 31'" 29=-16 



Level +0-16 +0 -20 -j-O -16 -f-0 -23 



Aberration ... —0 -02 —0 -02 —0 -02 —0 -02 



Clock rate ... +0-01 -00 -00 —0 -02 



T 22" 46"' 7^-81 22" 56-" 41=^-11 23" l-" 23^-33 23" 31°' 29^-35 



a 22 44 10 -08 22 56 21 -56 22 58 44 -54 23 31 39 -26 



a— T —157-73 —19-55 —2 38-79 +9-91 



log tan d 9-64790 9-94957 9-41445 0-01224 



logsin(r,— mj 7-85081 8-15248 7-61736 8-21515 



Ti- m, rf 1 37-53 +3 15-35 +0 56-98 +3 45-68 



r, —1 21-03 +0 16-79 —2 1-58 +0 47-12 



t, — 36-70 — 36-34 — 37-21 — 37-21 



t, — 36-40 — 37-21 



t — 36-80 



In this cas^ the last term of (44) is only 0'.0046. 



