365 



h. m. s. 



Brought forward, — 02 53.74 



Chicago observing station No. 2, west of the meri- 

 dian of Greenwicli, - - - - -f 5 50 31.15 



Result — Michigan city observing station, west of the 



meridian of Greenwich, - - . -f- 5 47 37.41 



Equal, in arc, to ... - 86° 54' 21". 15 W. 



Latitude (approximate) of the same station, as above, 41° 43' 25" N. 



III. WAUKEGAN, ILLINOIS. 



The point of observation here was 111 feet north of the parallel of, 

 and 103 feet west of the meridian of, the dome of the Court House, 

 = l".l difference of latitude; and Os.09 in time, difference of longi- 

 tude. 



l5^ Observations for the Latitude. 1858, June 29th. 



By 3 observed circum-meridian alti- ^ 



tudes of /3 Librae, south, 42 21 41.6 



By 11 observed circum-meridian alti- 

 tudes of ct Ophiuchi, also south, 42 21 44. 



Mean from 2 south stars. 



By 10 observed altitudes of Polaris (ct Ursee Minoris) 

 north, ..... 



Result — Latitude of station, 



Reduction to the dome of the Court House, 



Latitude of VVaukegan Court House, 



2d, Observations for the Time. 



Sidereal chronometer No. 2557, fast: 



By 13 observations on a. Lyrse, east (at 157j. 44m.) 



By 12 observations on u Bootis, west (at I6/1. 19m.) 



Result — Sidereal chronometer No. 2557, fast of side- 

 real time for this observing station (at 16A. 01m.) + 1 01 03.65 



