107 



Determination of the difference of Longitude between Toledo and 

 Columbys, Ohio, by etectric signals for comparisons of time, 

 January 2Dth, 1859. 



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

 (at 7h. 09m. 525. sidereal time), Ih. OA?n. 325.25. 



Rate per sidereal day, + 45.473; or per sidereal hour, -f 05.1664. 



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

 time (at lOh. 4:7m. 58s. mean time), 20m. 58s.61. 



Rate per mean solar day, — 0s.500; or per mean solar hour, — 

 05.0208. 



1st. — Toledo signals recorded at both stations. 



1st Mean. — Electric signals sent from Toledo to Columbus, Ohio, 02 09.02 



2d Mean. — Electric signals sent fx'om Columbus to Toledo, 

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

 above, __---__ 



02 09.01 



02 09.02 



Result: — Columbus Observing Station, east in longitude, of 

 Toledo observing Station, by a mean of the two sets of 

 signals, ----... 



02 09.015 



