94 



On the use of the 



no great diftance from it, 68°^ — 23d, ftill nearer 62°. — 

 24th, on the edge of the bank 58° — 25th, on Jaquet 

 bank 56°. — 26th, on the grand bank 52°. — ^thus at this 

 feafon of the year is there a difference of 30 degrees of 

 the thermometer between the water on the bank, and in 

 the fame latitude in the ocean, not far to the eaft of it. 



Our captain a fcnfible and obferving man, as well as 

 very experienced mariner, llruck with the regular gra- 

 dation of the thermometer on the approach of the bank, 

 and convinced of its having pointed it out long before 

 he had fufpedled his arrival upon it, from this time paid 

 much attention to the thermometer. He found as 1 had 

 foretold that it would equally flievv by the rife when we 

 had quitted the bank, and obferved that as it would ftill 

 more accurately define the limits of the gulf-ilream, as 

 it was hotter than any other part of the ocean, he might 

 with great advantage make his paffage to New-York by 

 following the northern eddy of the liream. This eddy 

 he knew to exift, but was unacquainted with the limits 

 of it, and knew not how to afcertain them, except by 

 the thermometer. We purfued this eddy pretty accu- 

 rately having made good the latitude of New-York in 

 long. 69. in about nine days from quitting the banks, 

 and every day performed nearly equal and good days 

 works. In this courfe from Newfoundland the ther- 

 mometer indicated every where the approach to danger ; 

 on the 5th of September, the vicinity of Sable Ifland 

 banks caufed a fall of 7° ; and on the 7th, a bank not 

 marked on any chart I have feen caufed a fall of 1 1 " de- 

 grees. Upon founding on this bank the ground was 

 flruck in 55 fathom, fine white fand, with fome fpecks 

 of red and black. Captain Allyn was fo much pleafed 

 with the accuracy of the thermometer and with the 

 fecurity in which he had failed for fome time in confe- 

 quence of it, and fo clearly perceived the advantage to 



be 



