538 The Account of a 
roidical correction for the latitude of Bagshot Heath is only 
about y^q of a second. Had indeed the latitudes of the sta- 
tions, which are far to the westward, been computed with 
distances from the meridian, and the perpendicular at Green- 
wich, some small errors might have been introduced, from the 
uncertainty of the earth's figure, and the consequent inability 
of computing the spheroidical correction with sufficient ac- 
curacy ; but as the distance between the parallels of Beachy 
Head and Dunnose is obtained very nearly, the latitude of the 
latter station may be considered as correct as that of the former 
one, and consequently the places in the vicinity of Dunnose 
have their latitudes determined with sufficient precision. 
