[ 38 ] 
l n 
Ad hor. x ante <$ <£ 28 26 = A 
O immoti 42 13 =B 
In ipfa $ <£ 53 6 — C 
Diff. inter A Sc B = 13 47 
Diff. inter ^ & C = 24 40 
A dcclinationibus vifis fi fubtraiiitur minima decli- 
natio, hoc cafu £ 17 0 51' 5 ,5" manet pro© 12' 15^ 
pro <T in d 14' 26''. 
10. Efto nunc^f (/^. 1 .Tab. II.) portio circuli paral- 
lel! ad deciinationem 17 0 51' 55"; & in eo pundum 
r, centrum C ad hor. 1 ante d, /af locus ®, b locus 
£ in d, erit dc— 1 3' 47" ; be = 24' 40". Ex pun- 
dis <d & b erigantur perpendiculares df Scab-, qua- 
rum prior = 12' 15", minim# fc. diff. deciinat. ; 
pofierior = 14' 26", maxim#, eric f centrum folis 
immoti, centrum lun# in ipfa d. reda ac, femita vifa 
lun# anius hor# intervallo. 
11. A pundo f ad ac, demiffa perpendicularis, 
gf quantitatem eclipfis, pundum g obfeurationem 
maximam determinat. Quod fi, porro, circino capiatur 
intervallum, nf & fm — fumm# femidiametrorum 
apparentium ® & *, eoque ex pundo/Tecetur hypo- 
thenufa produda mn, rrianguli abc, efficictur deter- 
minatio pundorum n & m, in quibus accidit initium 
& finis cclipfiSo 
1 2. Per calculum trigonometricum prod it r^=si8' 
4'' 5 gf — 3 r 3 7 r/ ; ac — 28' 34". Si infertur utac 
ad g c, fic tempus per ac — 1 hor. ad tempus per 
gc, refultat 37' 57"; hoc tempus additum ad h. 20, 
57' 3 1' 7 , (1 hor. fc. ante d) efficit momentum maxi- 
m# obfeurationis, h. 21, 3 5' 26". 
13. 
