351 



POSITIONS IN THE CITY OF CHICAGO. 



1st. Station No, 1, the observing 

 station of May, 1857, - - - - 



2d. Station No. 2, in the j^ard of 

 the University of Saint Mary of 

 the Lake, - - 



3d. Chicago observing station No. 

 3, on the north side-walk of Hu- 

 ron Street, 80 feet east of the 

 middle of Wolcott Street, - - 



4th. Steei:>le (front door) of .the 

 Roman Catholic Church of the 

 Holy Name, on Wolcott Street, 

 between Huron and Superior 

 Streets, -------- 



5th. Steeple (front door) of the 

 Episcopal Church of St. James, 

 on Cass Street, at the S. E. cor- 

 ner of Huron Street, - - - - 



6th. Dome of the Chicago City Hall, 

 or Court House, ----- 



7th. The New Iron Light House, 

 (unfinished) at the cud of the 

 North harbour-pier, - - - - 



8th. Steeple of the West :Market 

 House, at the intersection of the 

 middle of Randolph Street with 

 the west margin of Des Plaines 

 Street, 



9th. The point where stood the 

 Flagstaff of Fort Dearborn, now 

 destroyed to cut off a bend in 

 Chicago River, ------ 



10th. Intersection of the middle of 

 North Clark Street, with the 

 middle of Michigan Street; north 

 division of the City, - - - - 



11th. Tall chimney of the Illinois 

 Central Ptail Ptoad Company's 

 Machine Shop, on the lake shore, 

 between Twelfth and Fenimore 

 Streets; south division of the 

 City, 



12th. The old Light House, on the 

 south bank of the Chicago river, 

 near River Street, - - - - - 



Latitude North. 



Longitude West of Greenwich. 



In Arc. 



o / // 



41 58 50.8 



41 53 50.5 



41 53 46.3 



41 53 48 



41 53 45.2 

 41 53 06.2 



41 53 24.9 



41 53 08.4 

 41 53 22.9 

 41 53 28.5 



41 51 50.5 

 41 53 22.5 



In Time. 



87 37 44.8 ! 5 50 30.9 



87 37 47.2 

 87 37 47.0 



87 37 47.7 



87 37 43 

 87 38 01.2 



87 36 59 



87 38 47.8 

 87 37 35.6 

 87 37 59.1 



87 37 21.21 

 87 37 38.7' 



5 50 31.15 

 5 50 31.2 



5 50 31.18 



5 50 30.87 

 5 50 32.08 



5 50 27.93 



5 50 35.19 

 5 50 30.37 

 5 50 31.94 



5 50 29.42 

 5 50 30.59 



The foregoing table affords great convenience in enabling me to 

 take the Chicago time, by observation, at the station nearest to the 

 rail road depot, from whence I have to start to go to any distant place 

 which I may wish to connect chronometrically in longitude with the 



