51 
Rotation of the Pla?iet Saturn upon its Axis. 
With 430 , 1 see the same very distinctly ; but the small di- 
visions have hardly light enough, when so much magnified. 
I viewed the same belt with four different object specula. 
One of them shewed the divisions uncommonly well, 
Dec. 3. o h 35'. (Cor. — 7 ' 53", 8.) The quintuple belt upon 
Saturn remains as it was Nov. 22. (E) 
2 h 36'. 20-feet reflector ; power 157 ; 300 ; 480. I see the 
quintuple belt very well.* 
Dec. 4. 23 11 22'. ( Cor. — 7' 55" by a transit.) 10-feet re- 
flector. The quintuple belt is on Saturn, as it was last night. 
(I') 
4 h 57'. 7-feet. The quintuple belt is uncommonly dis- 
tinct.-f The three narrow dark belts are of an equal breadth 
over the whole disk ; the two bright belts which divide them, 
are also of an equal breadth throughout, but a little narrower 
than the dark ones. (G) 
5 h 58'. I see the quintuple belt so clearly defined through- 
out all the 3 dark, and 2 bright belts, that I am apt to guess 
that the side which presents itself to me now is not the same 
* I found that the strong, light of this instrument was too great a fatigue for the eye, 
which cannot bear to look at a very luminous object for a long time together. For 
this reason, I chiefly used the 7-feet reflector ; and in future, all the observations, not 
expressly marked otherwise, are to be understood as having been made with that in- 
strument; bearing an eye-glass of 3-tenths of an inch focal length. My object specula 
are generally from 84 to 88 inches in focus, and, therefore, give a power from 280 to 
293. The favourite one gave 287. I had another reason for chiefly confining myself 
to one instrument, and one power; which ryas, that every circumstance being as much 
as possible the same, a change in the.object I viewed might be the sooner perceived. 
t When I found the divisions between the small belts so remarkably distinct, I be- 
gan to suspect that they might hot be, all around the planet, perfectly uniform in 
brightness and figure; and therefore now described the phenomena that occurred more 
minutely and carefully. 
H 2 
