APPLICATION OF THE ELECTRIC TELEGRAPH. 337 



The observations were commenced at Columbia, January 

 4, 1854, but no opportunity for exchanging signals with 

 Ealeigh could be obtained until January 21st. It was 

 not until the llth of February, that three good series of 

 star signals had been exchanged. Dr. Gould then took 

 charge of the station at Ealeigh, while Mr. Dean went to 

 Columbia, and on the 12th of March, they succeeded in 

 completing the second series of three nights' satisfactory 

 exchange of signals. 



The season being too far advanced for the proposed 

 connection of Columbia and Macon, the Columbia instru- 

 ments were removed to Wilmington, North Carolina, and 

 those at Ealeigh to Eoslyn station near Petersburg, Ya., 

 and the observations for the connection of these two 

 places commenced with the month of May. Star signals 

 were exchanged between Mr. Pourtales at Petersburg and 

 Mr. Dean at Wilmington on the 27th of May and 6th of 

 June, when they exchanged stations, and again worked 

 successfully on the 20th and 23d of June. 



In January and February, 1855, observations were 

 made to determine the difference of longitude between 

 Cambridge, Mass., and Fredericton, New Brunswick. 

 It was originally intended to have an unbroken telegraph 

 communication between the Fredericton observatory 

 and that of Harvard University, but in consequence of 

 the wires from the latter to the office in Boston being out 

 of repair, Professor Bond found it necessary to trust to 

 two sidereal chronometers for the interval. The chro- 

 nometers were carefully and repeatedly compared with 



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