APPLICATION OF THE ELECTRIC TELEGRAPH. 355 



mined ; and the arrangements adopted were the same as 

 had been previously tried between Greenwich and Brus- 

 sels. Mr. Dunkin, assistant at Greenwich observatory 

 went to Paris, and M. Faye, assistant at the Paris ob- 

 servatory, went to Greenwich, and the comparisons 

 commenced the 27th of May. The second series of 

 observations commenced June 12th, and were made by 

 Mr. Dunkin at Greenwich and by M. Faye at Paris. 

 The final results for the difference of longitude as 

 determined by the two methods A and B are the 

 following : 



FIRST SERIES. 



SECOND SERIES. 



In order to refer the position of the observatory of 

 Greenwich to the ancient meridian of France, we must 

 subtract from the preceding result 0*12s. which represents 



