The fequel of the Qbfervations hath confirm'd,tbat the peri- 
od of 80 days, which was yet fomewhat doubtful in the fecond 
difcoveryjis fufficiently juft, and that he doth not anticipate 9 
revolutions,whiehare made in 2 years^but by one whole day ;& 
that in the Coajunflions with Saturn his Latitude augments on 
the one and the other fide,according as the ring of Saturn enlarg- 
eth it felfjthough the line of his motion is nor parallel to the cir- 
cumference of the ring: w'^ was noted in the firft Obfervations: 
The other Planet,which was difcover'd about the end of the 
year 1 67 2,hath his greateft digrefTion from the Center of Saturn 
only t diameter and 2 thirds of his Ring, and the period of his 
revolution about Saturnis 4 days and a half, but more precifely 
4 days, 1 2 hours, & 27 miaHis Latitude augments alfo accord- 
ing as the Ring enlargeth^and at the prefent that the largenefs of 
the Ring is greater than the Diameter of the Globe of Saturn, he 
is to pafs in theConjunflions without touching neither Saturn 
nor his Ring. Yet notwichftaoding we have nor yet been able to 
diftinguife him in the Conjunftions either in the upper or low- 
er part of his circle, but only in his greateft, as well Oriental as 
Occidental, digreffions. And this Satellit being alternately one 
day towards hiscoojanfiioniand theothcr day towards hisdi- 
greflicn, he is ordinarily not feen bur every third day,and rare- 
ly 2 days together,when it falls out that at the hour of Obferva- 
tion he is in the middle betwixt the conjuodion and digreOlon^ 
Laftly,the apparent magnitude of thefe Planets is fo little^ 
that pofte?icy will havecaufefo wonder, that their difcovery 
was begun by a Glafs of 1 7 foot. 
And forafmuch as we have endeavoured with the Qme atten- 
tion and care toobferve^u hether there be not the like Planets a- 
bout Ver^mdiud Mars, and have not been able to find any, even 
then vi'hen their diftance from the Earth was 20 or 30 times lefs 
than that of Saturn^ it may thence be concluded, that Ve^u^ and 
Mars have no Satellirs^whofe furface enlighten'd by the Sun and 
expofed to the Earth is not 20 or 30 times lefs than that of cLe 
two Sateliits of Saturn,and lefs capable of refieding the light of 
the Sun. 
An A€soH92t of feme Books : 
J. FHJRMAQOPOEU CoUegii Kegalis LonLA. r 677.'^ 
THis new Edition,reviewed by t he Royal Colledge of the 
Learned Phyfitians of London ^\\d,{\\ thefe confiderable ad- 
vantages over the former^ that great care hath been taken, nos 
only to correft the many Typographical faults committed in the 
g R 2 former 
