g50 V A NEW METHOD OP 



mistake in noting the minute or the 10th second, for^ in counting, he may 

 commence from 20s. instead of 10s. and so forth, 



I will further add, that when a meridian mark is not visible at night, the 

 adjustment of the instrument, during the time of observation, should be Veri- 

 fied by observing the transits of two or more stars differing considerably in 

 declination. 



Thus the same night in which the annexed transits were 



observed, Capella culminated, 11": 46: 01.5 



Sirius ...13: 19: 22.5 



Difference in solar time, 1 : 33 : 21.0 



Acceleration -f 15.53 



Observed difference of ARn. ... 1: 33: 36.53 



Per Tables Capellas ARn. is 5 : 3 : 53. JG 



Sirius 6: 37: 31. 00 



Difference computed, 1 : 33 : 37.24- 



Error in 62° =00 : 00 : 00. 71 



Also Capella culminated, 11 : 46 



Rigel ... ... ... ., 11 : 48 



Observed difference ... 2 



01. 5 



19. 7 



18. 20 



Acceleration -f- 35 



Difference in ARn. ... .,. .,, 00: 2: 18.55 

 Difference per Tables, 2 : 18. 80 



Difference or error ... ,.. ,,. 00'. 25 



