[8i] 
about the fame hour, there would be 9 or lo days wherein 
this Satellite could not at all be feen, for this only realbn and 
ifthe courfe of theObferuations were interrupted by ill Wea- 
ther or any other caufe, it has been above 20 or 22 dayes 
before it could be feen again : So it hapned foon after the 
firft difcovery thereof, the which has for this caufe been in- 
comparably more difficult to make, than any other hitherto 
made. 
The Diftance and Period of the fecond Satellite- 
The fecond or penintime Satellite of Saturn, according to 
the Obfervations hitherto made, is but three quarters of the 
length of his Ring diftant therefrom, and makes his Re- 
volution about him in 2 days, 17 hours and 43 minutes. 
There feldome pafTes a day wherein it is not joyned to 
Saturn^ either in the upper or lower part of its Orb. The 
Conjunflions or times wherein it paffes the whole length 
of the Ring, laftS hours; and 25 hours after one ends ano- 
ther begins. By reafon that at firft it could not be diftin- 
guiflhed, when it was not at a good diftance from the 
Ring, and before we had found but the Rules of its Motion, 
toforefeethe times proper to obferve it, we were feveral 
days without feeing it. Afterwards it was difcovered one 
day to the Eaflward^ the next day to the Wefiward^ and 
the third or fourth day at the fame hour, it was again in 
Con junftion with &/^//r;^: and fb becaufe the firft for feve- 
ral days together could not be feen at the ibme hour, it oft- 
en hapned that neither the one nor the other was Vifible, 
and when one began to appear, it was uncertain which of 
the two it was, both of them Chewing themleives alternat- 
ly, on day on the Eajl fide, and the next day on the WeF^ 
fide. 
This diftinftion was ftill more difficult, for that the dilf- 
erence of their Elongations is fo little, riiat for the moft 
part the i^Qon^ Satellite is found within the hmits of the 
L 2 Ion- 
