VOL. LXXXIV.] PHILOSOPHICAL TRANSACTIONS. 347 



shadow is a bright, uniform, and broad belt. Close to this bright belt is a broad 

 darker belt; which is divided by 1 narrow, white streaks; so that by this means, 

 it becomes to be 5 belts; namely, three dark, and 2 bright ones; the colour 

 of the dark belt is yellowish. The space from the quintuple belt towards the 

 south pole of the planet which is in view, is of a pale whitish colour; less bright 

 than the white equatorial belt, and much less so than the ring. The globular 

 form of Saturn is very visible, so that it has by no means the appearance of a 

 flat disc. 



Nov. 13, 3^ 30™; The quintuple belt on Saturn is as it was Nov. 11. I saw 

 it 3 hours ago, and several times since, without any visible change. 



Nov. ig, 3** 14""; The southern belt of Saturn is still divided into 5. The 

 evening is not clear enough to observe changes in it, if there were any. 



Nov. 22, 2*" 32""; The quintuple belt on Saturn remains still the same; 

 power 287. With 430, I see the same very distinctly, but the small divisions 

 have hardly light enough when so much magnified. I viewed the same belt with 

 4 different object specula. One of them showed the divisions uncommonly well. 



Dec. 3, o'' 35"'; 7-feet reflector; power 287. The quintuple belt on Saturn 

 remains as it was Nov. 22. I tried several double and plano-concave eye-glasses, 

 but found them all defective in figure except one, and that being of 1 inch focal 

 length, the power was too low to expect seeing these belts well with it. The 

 smallness of the field of view, with astronomical objects, is not so disagreeable 

 as it is generally supposed to be; for the eye may have a motion before the lens, 

 and by that means a small luminous object, when all the rest of the field is dark, 

 and while the telescope remains in the same situation, may be seen for as long a 

 time, passing through the field of a concave eye-glass, as it can in a convex one; 

 whereas with the latter, it is well-known that such a motion of the eye can be 

 of no use. 



2*^ 36™, 20-feet reflector; power 157, 300, 480; I see the quintuple belt 

 very well. We know that the planet Jupiter has many belts. Some remarkable 

 instances of their being very numerous are recorded in my journal, one of which 

 is accompanied with a figure. The observations are as follow: May 28, 1780; 

 Jupiter's belts are carved; and there are a multitude of them all over the body of 

 the planet. See fig. 5. 



Jan. 18, 1790, I viewed Jupiter with the 40-feet reflector. There were 2 

 very dark, broad belts, divided by an equatorial zone or space, the colour of 

 which was of a yellow cast. Next to the dark belts, on each side, towards the 

 poles, were bright and dark small belts, alternately placed, and continued almost 

 up to the poles, both ways. In taking out fig. 5 from my journal, I perceive one 

 so very unlike it just before, that I am induced to give it here, though rather 

 foreign to my present purpose: It contains however an observation which it will 



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