CONTENTS. 



I. Origin of the Coast-Survey Expeditiou . ... 



II. Previous determinations of tlie traus-Atlantic longitude 



III. History of the expedition ..... 



IV. Observations at Valencia ..... 

 v.- Observations at Newfoundland .... 



VI. Observations at Calais ..... 



VII. Longitude-signals between Foilhommerum and Heart's Content 



VIII. Longitude-signals between Heart's Content and Calais 



IX. Personal error in noting signals 



X. Personal equation in determining time ... 



XI. Final results for longitude ..... 



XII. Transmission-time of the signals .... 



1 



3 



6 

 15 

 28 

 47 

 54 

 60 

 64 

 69 

 t5 

 80 



rvii) 



