( (>7 ) 
then well judge of, by comparing it with the fir/t' 
Satellite, which was juft a little above it, but nearer 
Jupiter. It came out of the Shadow, about half a 
Diameter from Jupiter'% Edge. 
Decemh. 26th^ 5'^ 51' 12'' the fecond Satellite 
began to emerge. 
1725-6, Ja7^. ‘ythy 6'^ 28^ 30''. The third Sateh 
lite began to emerge. 
1724 June 10^ i$^ Saturn followed a Star 
(in Se?iex's Zodiack, but without any diftinguifhing. 
Mark) 51^' and an half of Right Afcenfion in Time, 
and declin’d from it South 40^'. 
June 2^thy 10^ o' Saturn followed the fame Star, ' 
13'' of Right Afcenfion in Time, and declined from 
it South, 3'/ or 4^' only, 
1725. 'Decemb. I'jth^ o' Jupiter preceded 9 
Aquarii 4" and an half of Right Afcenfion in Time, 
and declin’d from it South ii' 4$''. 
Id. B. When two of Jupiterh Satellites are paffing 
by one another, the one approaching, the other re- 
ceding from him (if not too far diftant from his^ 
Body) the Time, when they become equally diftant 
from his Limb, may, by the Eye, be very nearly de- 
termined, efpecially when the firft and fecond fo pafs, 
as by Experience I have found by the above men- 
tion’d Glafs, within lefs than half a Minute in Time, 
by the Agreement of two good Obfervers. 
Therefore the taking the Time of thofe Paftages, 
I mean of the firft and fecond Satellites, would be of 
more ufe in fettling the Longitude of Places, than 
the Eclipfesof any of the Satellites, except the firft, 
by Reafon of the Length of Time they take in e- 
merging, orimmerging, according to thefe Obfer-- 
vations. 
Ill, Am 
