336 Dr. blagden on the Heat of 
at three quarters after eight, being, raifed by fea-watei frefh 
drawn only to. 76 ° ; by nine the heat was reduced to 73°, and 
in a quarter of an hour more, to 71 0 nearly : all this time the 
wind blew frefii, and we were going feven knots an hour on a 
north-weftern courfe* The water now began to lofe the fine 
tranfparent blue colour of the Ocean, and to afl'ume fomething 
of a greenifh olive tinge, a well-known indication of found- 
ings. Accordingly, between four and five in the afternoon 
ground was ftruck with the lead at the depth of eighty fathom, 
the heat of the fea being then, reduced to 69°. I11 the courfe of 
the following night and next day,, as we came into (hallower 
water and nearer the land, the temperature of the fea gra r 
dually funk to 65°, which was nearly that of the air at the 
time. 
Unfortunately bad weather on the 26th. prevented us from 
taking an obfervation of the fun ; but on the 27th, though it 
was then cloudy at noon, we calculated the latitude from two 
altitudes, and found it to be 33° 26:' N. The difference of this 
latitude from that which we had obferved on the 25th, being 
2 ° 23', was fo much greater than could be deduced from. the 
fhip’s run marked in the log-book, as to convince the feamen 
that we had been fet many miles, to the northward by the 
current. 
On, the 25th at noon, the longitude by our reckoning 
was 7 4 0 W. and I believe, the computation to have been pretty 
juft ; but the foundings, together with the latitude, will deter- 
mine the fpot where thefe observations were made better than 
any reckoning from the eaftward. The ftiip’s run on the 26th, 
from nine in the forenoon to four in the afternoon, was about 
' $en leagues on a north-weft by north courfe ; foon. afterwards 
we 
