104 



vations made there on the nights of the 21st and 24thof January, and 

 the electric signals of the ^Sd, give us a second approximate determi- 

 nation of the longitude of Cleveland, as follows, viz. — 



Determination of the difference of Longitude between Toledo and 

 Cleveland, Ohio, by electric signals for comparisons of time, 

 January 2Sd, 1859. 



Sidereal Chronometer No. 2557, fast, of Cleveland sidereal time 

 (at Qh. 20m. sidereal time), 59;«. lOs.91. 



Rate per sidereal day, + 4s.515; or per sidereal hour, + 0s.l88. 



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

 time (at 10/^. Olm. mean time), 20/«. 55s.65. 



Rate per mean solar day, — 2s. 65; or per mean solar hour, — 

 Os.1104. 



1st. — Toledo signals recorded at both stations. 



1st Mean. — Electric signals sent from Toledo to Cleveland, 

 2d. — Cleveland signals recorded at both stations. 



07 19.645 



2d Mean. — Electric signals sent from Cleveland to Toledo, 

 1st Mean. — Electric signals sent from Toledo to Cleveland, 

 as above, ------- 



Result: — Cleveland Station is east, in longitude, of Toledo 

 observing station, by a mean of the two sets of signals, 



07 19.648 



07 19.645 



07 19.64 



