[404] 
A Letter from Mr, Flamfteed concerning the Ec- 
clipfes of S^txxxm Satellites for the year following. 
' 1684 with a Catalogue of them ^ and informations 
concerning its ufe. 
SIR, 
THe nits of the following Catalogue of all the E- 
clipfes pi "jupiters Satellits in the following year 
extending much further then that of a few only vi- 
fible with us- which you were pleafed to think worthy a 
place in the September TranfaHions I find my felf ne- 
ceffitated to give you a larger account both of it, and its 
Original; which I hope will be as kindly entertaind by 
you as that was. 
It has been my cuftome for fome years paft to make 
my felf quarterly a fmallj^/'^;w^r^\f bf the Eclipfes of Ju^ 
piters Satellits vifible with us, that io none of them might 
efcape me unobferved when the weather permitted ; 
having by this means obtained a good ttock of obferva- 
tions of them of my own, befides what 1 had colle(3:ed 
from the Works of Galileo, Hodierna^ Borelli^ the pa- 
pers of Mr. I{poke late profeffer of Geometry at Grejbam 
Colledge, (happily preferved and kindly imparted to me 
by his once intimate freind, and one of my honoured 
Patrons, the Right Reverend Seth Lord Biftiop of Sarum J 
and the communications of my honourd freinds and co- 
refpondents Monfieur Cajfmi, and Mr. Towneley. I found 
my felf well furnifhed, as I thought, for the reftitution 
^of their motions, which as I have formerly told you I 
-atempted laft Summer, and accompliftied with fuch 
fuccefs ; that having feen only 2 of the praedidted Eclipfes 
of the firft Satellite I find neither of them differ above 2 
Minutes from my calculations. Ihavealfo obferved one 
of the third, not above 3 Minutes faulty , and another 
of the fecond erring but two 5 which makes me hope the 
» ill- 
