t *35 ] 
apprehend the greateft error will be thought of very 
little conlequence in the practice of navigation. 
I here clofed my account of the Ihip’s way ; but 
the evening of the 12th proving very fine, and hav- 
ing an opportunity of obfervine the d ’s diftance from 
Aldebaran to the eaft, and from a, Aquilse to the 
weft of her ; I took the following ones, as they may 
be of ufe, if compared together, to fhew what de- 
cree of accuracy thefe obfervations will admit of. 
Time by 
the Watch. 
]) ’s farthelf 
L. a Aldeb. 
Alt. of 
D L.L. 
Time by 
the Watch . 
)) ’s nearelt 
L. a uAquil. 
Alt. of 
D L.L. 
9 h 57 ' 
8o° 19' 
39 ° 9 ' 
io h 13' 
5 C 57 ' 
3 « 55 
10 6| 
80 I4§ 
7 
10 19I 
52 0 1 
47 
10 8| 
80 12 
b 
10 22| 
52 1 
43 
The latit. of the fhip at this time was 49 0 34' N. 
The error of the quadrant with which the diftances 
were taken was — P, and the dip of the horizon 3 f . 
The obfervations of Aldebaran give the longitude 
of the fhip 4 0 ic/ W. and thole of a Aquilae 3 0 
43' | j but I would not be underftood to mean that 
either of thofe is the long, of the fhip, becaufe I 
had no opportunity of finding the error of the watch. 
On the 13th the captain, finding that he gained 
nothing by beating in the Channel, took a pilot on 
board for Plymouth ; and on the 14th, about one 
o’clock, we came to an anchor in Hamoze. On the 
1 6th, finding the eafterly winds hill likely to con- 
tinue, Mr. Dymond and myfelf took places in the 
flage, and arrived in London on the 19th about 9 
in the evening. 
I flatter myfelf that no gentleman will think that 
I have laid the preceding remarks before this learned 
Society. 
J w 
