194 BIGELOW 



The reflected observations are also corrected for the position 

 of the mercury basin, the correction being h tan z where h is 

 height of telescope axes above the artificial horizon. This cor- 

 rection is o".04 for upper culmination, and o".03 for lower. 



The mean of the 4 positions above pole combined with the 

 mean of the 4 below gives the value for latitude corresponding 

 to each star. 



LATITUDE. 



The nine zero stars give 48". 81 ; the seventeen others, 

 48". 74. The value from the nine was given half weight and the 

 adopted value for the latitude of Ann Arbor is 42°i6'48".76. 



The value found recently by Dr. Hall is 48^.8 (see Astro- 

 nomical Joiirnal, 518). 



This value of the latitude combined with the zenith distances 

 gives for each star the eight values of declination in the last 

 column of Table I. The mean of the four values above pole, 

 with the mean of the four below, gives the linal value of abso- 

 lute declination. 



In the case of the live stars not observed in all eight positions, 

 adopted values of declination were found by correcting for flex- 



