( 5i8f ) 
we were very stnpatiet^t f or an opportunity of giviog our fdves 
more fatlsfaaion about this fhsnomenon. Tbe heaveos were 
not favourable to us till the loth of Januan 1673 5 ^^^n 
I this little Star appear'd to have return d almoft to the fame po- 
' fitiou in refped df Saturn, and his ordinary SatcUit, where it 
had been That which made us wonder, was, ta 
have found three times confecutively this fmall Star between 
Saturn and his Ordinary Satellit, always in a diftancc almoft 
equal from one and the other. But our admiration ceafed at 
the fourth Obfcrvation, made Jamar. 15, io which the Or- 
dinary Satellit was Oriental, and the New one Occidental, as 
it had been in the precedent, but a little nearer to Saturn. We 
had that evening time enough attentively to obferve this Pla- 
cet for a whole hour together, during which we perccivcd^it 
approached to Saturn on the Weft, and confequently was in 
the fupeiior part of his Circle : which did fully confirm us in 
thefuppofition we were inclined to, that it was an Z«rer/>^a* 
tcllit. Thus the pourfuicof another Satellit, which we knew 
to be further diftant from Saturn, and to have a longer peri- 
od, roadt usdifcover this, which is nearer to it, andwhofe 
period is ftiorter. 
IV. 
Hjpothefts of the JHoiion of the Interior Satellit. 
^^:T^HeB it was^ that comparing the Obfervations together, 
_£ ^ we btgau to find the Rule of the Motion of the New 
Interior Satellit. For the two laft fli€W*d us, that in 5 days 
hehad made mure than a whole revolution^ The firft obferva* 
tion compar'd with the third made us Judge,th3t in i 8 days he 
had oiade a Number of revolutions^almoft whole oueSj which 
ceTtaioly were four 5 each of them w^as of 4rdays : So that 
between the sol^ and i5fi& it might be, that there had been 
one revolution of 4^ days, or two revolutions of at days 
each. ' . - • ■ - 
But the combination of the firft with the ftcood made us fe- 
clude the period of 2j d lys. We therefore judged by thefe 
obfervations 5 Ti&^2f this latt Planet finifties his revolution about 
Saturn in 4i days 5 the Scmidiametcr of thisGircIeis of 
three 
