28 ASTRONOMICAL anv.’ 
The fubtra&ive fign — is to be ufed, when: Bm): — 
tude is north, the additive -+ when it is fouth. ~< 
In occultations, when the moon's latitude is. larges 
Se Poe ere "f 
= pD fine 4 i.e. y, found by pD. fine.2, muft lesa 
li ratio. of the,co-fine of the moon's true la. 
© Co-fine L titude to. Radius. - 
~ Formulas have been invented to find ii pines ia diet. 
way, when the moon’s zrue latitude and longitude are given ;. 
but it is rather eafier, in this. cafe, (meme Siem DE wget 
mom, thus, af TT váiicind 
xis 
| Add together spinis p. fine D, fine B, which will j give 
Y> or the parallax in longitude nearly. “Add the parallax thus. 
found to B, which will give 2 nearly, viz. the diftance be- 
tween the moon's vifible longitude and the longitude of the 
nonagefimal degree. Then log. p, fine D, fine 4 thus nearly 
found, will give y, the parallax. in longitude, fufficiently exact ;. 
and this added to B will give corre& b. Add together log. Ps: 
fine C, which will give x, or the parallax | in latitude nigh” the 
truth, This being properly applied to L, the moon's truela- . 
titude, will make /, the «//le latitude, nearly. Then add to- 
gether log. p, fine D, fine /, thus nearly found, and co-fine 4, 
which give the logarithm of a number, that added to, or fub- 
tracted from x, as before geienen il mika the, eagrect 
parallax in latitude, 
vta to the moon's augmented fcmi-diameter we` may 
fy B : C :: the moon's horizontal femi-diameter : her aug- 
mented. . 
