C 337 ] 
taking the equation of the equino&ial points into 
the account dill remains uncorrecded by him i and 
as I flatter myfelf, that what is faid here may tend to 
fet the whole matter in a clear light, I apprehend 
the publication of thefe remarks may flill be proper. 
The French Almanack, called the Connoiflance des 
Mouvements Celedes, hath been defervedly edeem- 
ed by adronomers, as the moft complete publication 
of its kind. Its prefent learned editor M. Delalande 
hath rendered its ufe more extenfive by making the 
calculations from the lateft and mod approved tables, 
and alfo adding fuch explanations of them, as, at 
the fame time, lay open before his readers the mod 
confiderable improvements of modern adronomy. 
Neverthelefs, as the bed mathematicians are not in- 
fallible, fo I have reafon to think I have difcovered 
fome errors in M. Delalande’s method of computing 
the equation of time in this ephemeris, or, which 
comes to the fame thing, the mean time, at the in- 
dent of apparent noon. 
M. Delalande fays, page of the Connoidance for 
1760, which he repeats in the publications of other 
years, that, “to calculate exactly thedifference between 
“ mean and true time (that is to fay the equation of 
cc time) at the indant of apparent noon, the fum of 
<c the equation of the fun’s centre, the difference 
{C between his longitude and right afcendon, the lunar 
“ equation, the equations of Jupiter and Venus, and 
tc that of the preceffon of the equinoxes, with their 
“ proper figns, mud be converted into mean folar time. 
He adds, that it was impodible, before this time, 
e< to obtain the equation of time exactly; jd, becaufe 
“ hitherto no account has been made of the four 
Vol. LIV. X x « little 
