/ 
Dr. Herschel’s Obfervatiohs on the 
the inner fatellites; the 5th, or outermoft, requiring a dif- 
ferent reduction, on account of its deviation from the plane of 
the ring. Moreover, I am inclined to believe, that tne lureft 
way of obferving the 5th, is to truft only to meafures, taken 
with micrometers which give the diftance and angle of por- 
tion, except in fuch cafes when the eye is nearly in tne plane 
of this fatellite’s orbit, where the different reductions may be 
negtedted, without bringing on any conliderable inaccuracies. 
The order of the numbers by which 90 comes to tne left, and 
270 to the right, is taken from the motion ot the fatellites, 
as they appear to revolve in their orbits, when feen 111 tele- 
fcopes of my conftruction ; and which is alfo the real direction 
of their motion according to the order of the figns. but the 
points 360 and 1S0 mult occafionally be changed in their de- 
nomination of north or fouth, according to the real fituation 
of the plane of each fatellite’s orbit. At prefent, for inftance, 
when the fatellites are at 360, that part of their oibits in 
which we find them lies to the fouth of the center of the 
planet; but about the end of Auguft, 1789, and afterwards, 
the orbits of the fix inner fatellites were differently fituated ; fo 
that the fame points then were turned towards the north. I 
need not remark, that the fituation of thefe points was 
changed again when the earth palfed through the plane of the 
ring, and that it will change, in the 5th fatellite likewife, 
when we come to be in the plane of its orbit. 
The calculations of the places of all the fatellites have been 
made according to tables which are given at the end of this 
Paper. Their form being very Ample, I thought it not amifs 
to communicate them, for the ufe of thofe who may with to 
enter into a more particular examination of the following ob« 
fer vat 10ns % or to follow the fatellites in their orbits at an^ 
future 
1 
