102 



23 42.018 



23 42.056 



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

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

 as above, ------- 



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

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

 of signals, .-.-.. —02342.037 



Longitude of Chicago Station No. 3. - + 5 50 31.20 



1st Approximation. 

 Longitude of Cleveland Station, - - +5 26 49.16 



When the time-signals were being exchanged with Chicago, there was 

 much excitement and some interruption, from noise, in the telegraph 

 offices at both places, arising from the celebrations which were going on 

 in commemoration of the successful laying of the great metallic cable 

 across tlie Atlantic ocean, which placed the continents of Europe and 

 America, for a short time, in electro-telegraphic communication. The 

 news of this important event was, this day, announced by telegraph 

 all over our country. This accounts for the signals, forth and back, 

 not agreeing quite so close as usual. Here there is an extreme dif- 

 ference of Os. 14 of time between the greatest and least telegraphic re- 

 sult. But if we except 3 out of the 14 signals transmitted, the extreme 

 difference in the 11 remaining is only 0s.03 of time. So far, there- 

 fore, as the signals arc concerned, there is probably no appreciable 

 error in the mean adopted. 



Comparison of the Longitude with the Meridian of Toledo. 



1859, January 22d. Arrived at Cleveland, from Toledo, this 

 afternoon. Cloudy all night, and no observations could be made. 



January 2'Sd. At the station which was occupied for the obser- 

 vations of August 5thj 1858. 



