ae 
= 
86: MARITIME OBSERVATIONS.’ 
to Goo°, and then continueda very gradual defcent as we 
went to the Northward, ’till we ftruck foundings, when it 
was at 48°. 
It may be here obferved, that the decreafe in the heat of; 
the water was fo gradual as to give but one degree in a’ 
days run, while in going to, or coming from the coatt of. 
America, the thermometer will alter 8 or 10 degrees in a 
fewhoursrun. It is well known, by founding, that the 
Englifh coaft extends with a very gradual defcent to a 
greatdiftance. It is alfo known that the American coaft 
does not extend very far, and the water is fuddenly deep. 
Let thefe facts be compared with the changes in the ther- 
mometer, on the two coafis, and they will agree with what 
has been faid about the ufefulnefs of that inftrument. 
It may be obferved in Doétor Franklin’s journal on board 
of the Reprifal, that in November 1776, when near the- 
banks of Newfoundland, his thermometer fell ten degrees, 
thouh confiderably to the Southward of them, and after 
paffing them, it rofe nearly to its former flate: the Do@or 
did not make any obfervation on this circumflance;/ but it) 
agrees ‘with my journal, innearly the fame, place made 
nine years afterwards. . 
The journal C. from England to Hallifax, fhows the 
changes in the heat of the water as we failed over banks. 
and deep water alternately, with an accuracy, that I con-: 
fefs, exceeded my expetation, the land appearing as the 
thermometer indicated:our approach to-it. 
The journal D from Hallifax to New-York not only | 
fhows the variety of depths we pafled over, but indicates 
the inner edge of the gulph flream. . As by the thermo-’ 
meter and foundings it appeared to me that the fhip wasa 
head of the reckoning, made allowances for the eddy cur-} 
rent of that fiream in our favour, and comparing thefe 
with the chart, I noted in the journal, the longitude IL 
thought we were in, under that calculated by the thip’s 
officers : 
