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If every rhumb is then found to poffefs its true 
latitude in this chart at every degree and minute of 
longitude, without any fenfible or explicable error 
(to make ufe of our author’s own words) it follows, 
that the degrees of latitude are duly encreafed, or that 
the table of meridional parts are true. 
The great Dodor Halley has given us a curious 
method of dividing the nautical meridian, and of 
performing the problems in failing according to the 
true chart, in Philofophical Tranfadions, N°. 219. by 
a method different from Mr. Wright’s, but fo nearly 
correfponding in pradice, that this alone is a fufficient 
teffimony in favour of my author. 
Our worthy brother Mr. John Robertfon, in his 
excellent Elements of navigation, vol. II. page 358, 
expreffes himfelf thus: “ Now although a table thus 
« made (Wright’s table of meridional parts con- 
“ ftruded to minutes) be abundantly fufficient for 
« all nautical purpofes, yet had the fecants of fmaller 
<c parts than minutes been taken, the table would 
« have been more corred; and therefore Mr. Ought- 
“ red, Sir Jonas Moore, Dodor Wallis, Dodor 
<{ Halley, and others, have been induced to find me- 
<c thods of conftruding thofe tables with more ac- 
<c curacy than by the addition of fecants to every 
<c minute. 
“ But a table of meridional parts, conftruded by 
“ the inoft accurate method, only (hews that Mr. 
“ Wright’s tables do no where exceed the true me- 
“ ridional parts by half a minute, and this only near 
“ the pole; for in latitudes as far as navigation is 
“ pradicable the difference is fcarce fenfible”. — 
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