596 Mr. Dalby’s Remarks on Gen . Roy’s Account 
others of the fame triangle : for inftance, in the firft triangle 
the obferved angle at Hanger Hill is 42° 2' 32", and that for 
computation 42 0 2 7 34" ; now this angle was not taken fo 
accurately as could be wifhed, but the others were repeatedly 
obferved. 
P. J 78. in the XXIX triangle, for 186113 put 147386.9. 
P. 180. in the XXXIV. triangle , for 252469 . §put 252496.9. 
As the obfervations at Fairlight and Dover are omitted, upon 
which the angles of the XXXIII and XXX IV triangles de- 
pend, it will be neceffary to give them, and alfo (hew the 
manner of obtaining thefe angles. 
At Dover Caftle, the angle between the white 
light at Montlambert and the lamp at Padlef- 
worth was obferved . 
Correflred for computation 
At Fairlight, the angle between the white 
lights at Montlambert and Blancnez was ob- 
ferved ... . 
For computation 
Between the lamp at Lydd and white light at 
Blancnez .... 
For computation 
The acute angles in the XXXII triangle refult from the 
other angle and including tides 147386.9 and 42561.18. 
in the XXIX triangle 
109 
109 
8 25.5 
8 
2 5 
17 46 
1 7 46 
18 
18 
2 
2 
° r 
3 1 
3 U 5 
rm tneAMA triangle 
Angle at Fairlight { j Q fhe x xxn triangle 
Angle at Fairlight between Dover and Lydd 
Angle at Fairlight between Lydd and Mont- 
lambert (17 0 46'' 3'T 4* 1 8 ° 2 / 3 1 ) 
Angle at Fairlight In the XX XI II triangle 
o 
I 2 
2 -95 
6 6 39.43 
7 3 1 2 3 - 5 2 
35 48 35 
43 19 58.52 
Angle 
