236 Gould's Report on Trans-Atlantic Longitude. 
Foilhommerum and Heart’s Content on but five dates; October 
by pressure upon either button, so that eve nal transmitted 
through the cable was recorded upon the ie ap at the 
station whence it was sent. 
It is thus manifest that the times of sending the signals were 
accurately recorded, while the times of receiving signals were 
recorded after an interval of time dependent on the perso! 
error of noting, and inseparable from the time of transmisstot 
through the cable, except by some independent means of meas- 
urement. If this interval were the same for both observer; a 
would be elim entirely from the longitude and merged 
