( 771 ) 
tu'n. Widvthts Fmendation the place of this Satellfte 
may for the fiirurc be computed witli a fufudent exat^- 
nefs. 
The Third Satellite by an original miftake in the 
Letters in N®, 187, is ail wrong* its dayly Morion 
being there printed 2\ 18°. 41'. ^o" inflead of z'. 
41'. 50"; as may be perceived by the Period thereof 
being determined, in the_ aforefaid PArmoirs of 1714. to 
be 4''. \z’’* 25'. iz". that is, that it makes 400 Revolu- 
tions in 1807 days. This Satellite was obferved by 
Mr.CafJlnr, Apll 4”. St. N. lok P.M. to have newly pad 
its inferior conjundion with Saturn, and a perpendicu- 
lar from it fell on the extremity of the weftern Anfe^ fo 
that at about 5''. P. M. it was with the center of the Pla- 
net then in ’tP. j”. 23'. and confequently in X 5°. 23'. But 
ineunte anno Gregoriano 1686, Epochs thereof was 
n?9° 39'. So that from the Noon of the lad of De- 
cember 1685’, to April 4°. 6'’, 18'. anno 1714, that is, in 
10320 Days 6'’. 18', there have been made 22847 Re- 
volutions of this Satellite to the Equinodial; from 
which Data, the Tables of its Motion are readily deriva- 
ble 
The Radix of the penintime or fecond Satellite, ac- 
cording to theaforefaid Letter, ineunte anno Greg. i 685 . 
was in 9°. I o'. But by the Oblervarions of Mr* Cajftni 
made the Nights before and after, this Satellite was in 
its iuperior COnjundion anno 1714 April 1 1' 7. St. 
that is, in 5°. 21', where Saturn then was: So that 
April 22''. 12', an entire Number of Revolutions were 
performed fince the Epochs of 1686, that is, in 10320 
Days zz'". I2 : which Number can be no other than 371, 
according to the Period thereof given Memoire, 
viz. 2^ 17^41' 22". 
Ladly the innermod or fird Satellite, at the fame 
time, vizt 1714, April 30'. iSr. N. was in jcs 
Ffffff feiiuur 
