70 



2d. — Fulton sisfnals recorded at both stations. 



2d Mean. — Electric signals sent from Fulton to Chicago, 

 1st Mean. — Electric signals sent from Chicago to Fulton, as 

 above, _----._ 



10 08.76 



10 08.74 



Result: — Fulton Observing Station is west, in longitude of Chi- 

 cago observing Station No. 3, by a mean of the two sets of 

 signals, + 10 08.75 



Longitude of Chicago observing station No. 3, -|- 5 50 31.20 



2d Determination., June 236?, 1859. 



Longitude of Fulton Station, west of the meridian of 

 Greenwich, by the time-observations and the elec- 

 tric signals exchanged June 23d, 1859, 



\st Determination, March 1858. 



Longitude of the same station by the time-observa- 

 tions, and the transportation of the two chrono- 

 meters between the 22d and 29th of March, 1858, 

 above given, .... 



6 00 39.95 



6 00 40.03 



Result adopted — Longitude of Fulton Station, west 

 of the meridian of Greenwich, by a mean of the 

 two determinations, - - - - 6 00 39.99 



Equal, in arc, to - - - - 90° 09' 59". 85 



Latitude of this station, as before, - - 41° 52' 01 ".33 N. 



By the triangulation, based on the true meridian, made in March, 

 1858, taking our departure from the astronomical station whose posi- 

 tion is above given, we obtain the positions of other stations, serving 

 as permanent points of reference, in Fulton, as follows, viz. — 



