84 



XX. NEW BUFFALO, MICHIGAN. 



This place is situated on tiie south east shore of lake Michigan, 

 nearly opposite to Chicago. 



Station. — In Mr. Joshua R. C. Brown's garden. From this station 

 to the point of intersection of the axes of VVhitaker Avenue and Me- 

 chanics Street, is S. 5^ 12' VV. (true) 106 feet. 



\st. The Latitude. 1859, May 2M. 



By 35 circum-meridian altitudes of ot Virginis, south, 

 combined with 32 altitudes of Polaris (a Ursse ^ 

 Minoris) norlli; latitude of station, - - 41 47 48 N. 



Reduction to the intersection of the axes of VVhitaker 



Avenue and Mechanics Street, - - — 1 



Latitude of ihe point of intersection of VVhitaker 



Avenue and Mechanics Street, - - 41 47 47 N. 



2d. Ob Starvations for the Time. \st. 1859, March l^th. 

 Sidereal chronometer No. 2557, fast : 



By 3 observations on « Tauri, west (at h. m. s. 



8h. 42m.) - - - 1 25 07.46 



By 8 observations on Ca[)ella (a Au- 

 riga), also west (at 9/t. 04/71. ) 1 25 07.37 



By 11 observations on 2 West Star.-^, 

 givino; weiaht accordins; to the 

 number of observations on each, 

 (at 8h. 53//i.) - - - 1 25 07.42 



+ 1 25 07.42* 

 By 10 observations on a Bool is, east (at i)h. AAm.) + 1 25 09.18* 



Result — ('hronomeier No. 2557, last of sidereal time 



for this station (at 9A. 19w.) - - -j- 1 25 08.30 



Clouds prevented the selection of the best time-stars; and none were 

 visible for the latitude. 



* Here it is evident that too great an index error for tlie sextant was 

 used in computing the altitudes for the time by the East and West stars. 

 That error had changed since last observed, which is the cause of the differ- 

 ence of results East and West; — the west observations giving too little, by 

 an unknown quantity, and the cast observations giving too much by the 

 same <|uantity. The mean of the two results elimhiates the error, and gives 

 the correct time as reported. J. D. G. 



