220 Gen, Roy’s Account of a 
imaginable care, we fhall then, and not till then, be able to 
judge to which the preference may be due. Thus five or fix 
long Rations, in or nearly in the parallel of Greenwich, fuch, 
for inftance, as that of Shooter’s-hill Tower, would reach 
from the eaft quite to the weft of the ifland : and as a very 
confiderable degree of confiftency might be expedted among the 
refults for equal portions of the parallel, this method feems to 
be as likely as any to furnifh data for determining the nature of 
the fpheroid or figure of the earth. 
Table of the degrees of the earth , conflruffed on the hypothefs of 
M. Bouguer. 
Befide the table of comparifon of the arc between Green- 
wich and Perpignan, which I have already endeavoured to 
explain, this Paper is accompanied with another, which, as 
well as the former, was originally intended folely for my own 
ufe. With this view it was at firft only computed for every five 
minutes of the 51ft and 53d degrees of latitude, that I might 
thereby be enabled more readily to compare the longitudes and 
latitudes of the refpedtive Rations in our progrefs towards the 
coaft; and more particularly to fit it for operations in the foutlx 
parts of England, as likely to be firft: carried into execution. 
In order, however, to render it more generally ufeful, it has 
ftnce been extended to every five degrees in the higher and 
lower parts of the quadrant, and to every ftngle degree in inter- 
mediate latitudes. The table not only contains the degrees of 
the meridian and of longitude, but alfo thofe of a great circle 
perpendicular to the meridian, and likewife fuch as are oblique 
to it, for the other feven points of the compafs. With regard 
to the conftru&ion of the table, it is only neceflary to make 
fome 
