Unsuccessful Becjj-sea Suundhif/s. iij 



length of the different periods required in paying out the 

 line during the experiment; — 



Total tiine in running out the entire length . Houi's 2 39 28 



As the winding up of the tube requires at least the same 

 period, it may easily be conceived how great is the expenditure 

 of time necessary for such an experiment, and on what 

 chances the success of the whole operation depends. Though 

 this trial was partially unsuccessful, yet so much is certain, 

 that at this point, 24^300 feet of line were run off without 

 reaching the ground. There is always, however, to be 

 taken into consideration the under-current, which draws the 

 line out of the perpendicular, and renders the result of the 

 operation rather doubtful. 



We now sailed with a fresh and steady trade-wind towards 

 the thirtieth degree of W. Long., and thence along that meri- 

 dian to the southward. 



In the night, between the 29th to the SOth, we crossed the 

 parallel of the sun*s declination, upon which the direction of 

 our shadows, already for several days scarcely perceptible, 

 was of course changed from north to south. 



We soon crossed the belt of the north-eastern trade-wind, 

 as we made daily from 180 to 200 miles. On the 3rd o July 

 the wind became very unsteady, and on the 5th, in 8° 30 N. 



I 



