C 246 ] 
at 3 h 57' 3" pall noon at London: and it will final- 
ly leave the earth on the 31ft of July, A. D. 2 5 93 ’ 
at io h 2 ^' 31" paft noon, at the completion o! its 
y2d period. So that, the true motions do not only 
alter the true times from the mean, but they alfo cut 
off five periods from thofe of the mean returns of 
this.eclipfe. 
In this, and all other eclipfes of the Sun, which 
happen about the afcending node of the Moon’s or- 
bit, the Moon’s fhadow firft touches the earth at, or 
about, the north pole; and goes more and more 
ioutherly over the earth in each return, till it quite 
leaves the earth at, or near, the South pole. But 
when eclipfes happen about the defcending node, (as 
that of July 14th, A. D. 1748 did) the Moons 
fhadow firft touches the earth at, or near, the louth 
pole ; and goes gradually more and more northward 
in each periodical return, till it finally leaves the 
earth at the north pole. And as the obliquity of the 
Moon s orbit to the ecliptic is the fame about both 
the nodes, there mull be the fame number of eclipfes 
about the one as about the other. 
But I beg pardon, for mentioning things to your 
Lordfhip, and the Royal Society, which muft be 
much better known to you all, than they can be to 
me who am, with the highefl degree of refpedt, 
My Lord, 
Your Lordfhip’s 
moft obliged, and 
Mortimer-Street, mofl obedient humble fervant, 
Nov. 16, 1763. 
James Fergufon. 
TABLE 
