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London , from whence he infers that the firft of thefe 
Cities is one twentieth greater than the latter, is found- 
ed on a falfe Suppofition, vit. That under the Parallel 
of ‘Paris 20 Degrees of Longitude are equal to 15 of 
Latitude , and confequently that by drawing Meridians 
from 20 to 20 Seconds, and Parallels from if to if, 
the Figures formed by their lnterfe&ion will be per- 
fect Squares : For the Equator and its Parallels are 
to each other as the Sines of their refpeCtive Di- 
fiances from the Pole. Whence, as the Radius , or Sine 
of 90 Degrees, is to the Sine of the Difiance of any 
Parallel from the Pole , or Cofine of its Latitude :: fo 
is a Degree or any other Part of the Equator , or of 
any great Circle , to the like Part of the given Paral- 
lel. Therefore taking the mean Latitude of Paris at 48°. 
fi', the Proportion of the Degrees of a great Circle 
to thofe of the Parallel of Paris will by a Table of 
Sines be found to be as 1 to .6580326. Whereas ac- 
cording to Mr. de Life , that Proportion is only as 20 to 
if, or as 1 to .75. The Figures therefore which Mr.’ 
de Life calls Squares, are not fuch, but Rectangles , 
whofe longeft Side containing 15 Seconds of a great 
Circle , bears the fame Proportion to the fhortelf, con- 
taining 20 Seconds of the Parallel of Paris , as .7? 
does to .6f 8, &c. or nearly as 8 to 7. And the Inter- 
vals, which he ought to have allowed to the Meridians, 
to make perfect Squares of thefe Figures, ought to have 
ben A? &c. Seconds, or nearly 22"f or 22". 48'" of the 
Parallel of Paris. 
Now Mr. de Life fays, thefe Figures are perfect 
Squares , and has computed them as Squares, whofe 
Side was if" of a great Circle ^ for he fays Paris con- 
tains 63 of thefe Squares, which makes 3 f 38647 fquare 
Toifes , 
