ASTRONOMICAL DETERMINATIONS. 



23 



LATITUDE DETERMINATION. 



List of stars, for Observation with Zenith Telescope. 

 [Station: Rapid, South Dakota. Approximate Latitude : 44° 05'.] 



5° 38 ; X. I 

 5 36 S i 



] 32 N i 



5 37 X 



1 J7 X. 



5 UJ S. 



12 19 H. 



23 05 X. 



11) 31 S. 



Example of Record. 



[Station: Rapid, South Dakota. Date: November 9, 1890. Instrument: Fauth co 

 No. 534. Observer: S.S.S. Recorder: A. F.D.I 



ed transit and 



REDUCTION OF LATITUDE OBSERVATION'S. 



Before proceeding with the reduction of latitude observations, it is nee 

 essary to investigate the constants of the instrument, to ascertain the value, 

 of a division of the latitude level, and of a division of the head of the 

 micrometer screw. 



The value of a division of the head of the micrometer screw is measured 



