85 



Sd. The Longitude. 



This result for the New Buffalo time, and the results of the time- 

 observations at Chicago on the nights of the 15lh and 19th of March, 

 — which last was the earliest date after our return to Chicago from 

 New Buffalo, that observations could be made, owing to bad weather — 

 combined with the following telegraphic signals, give us our 1st deter- 

 mination of the longitude of New Buffalo, viz. — 



Determination of the difference of Longitude between Chicago and 

 New Buffalo, Michigan, by electric signals for comparisons of 

 time, March \Qth 1859. 



Sidereal Chronometer No. 2557, last, of New Buffalo sidereal time 

 (at lOA. 34m. 285. sidereal time), U. 2bm. 08s.66. 



Rate per sidereal day, + 6s.793; or per sidereal hour, + 05.283. 



Mean solar Chronometer No. 141, slow, of Chicago, mean solar 

 time (at lOA. 54m. mean time), 4?«. 40s.25. 



Rate per mean solar day, — 05.094; or per mean solar hour, — 

 05.0039. 



1st. — Chicago signals recorded at both stations. 



1st Mean. — Electric signals sent from Chicago to New Buffalo, 03 31.52 



