230 On the Physical Appearance of the Planet Jupiter. 
1881, January 21. Clear. Milky Way rather pale 
No. 2.—L. =2°.82. T.=6h. 48m. 
S, decidedly brick red ; b, grey ; ¢, greyish red ; its northern edge very bright ; d, 
faint, indistinct. In 3, white clouds, the round one next to the central meridian 
very bright. 
No. 4.—L.=15°.87. T.=7h. 5m. 
S, decidedly brick red. I sometimes thought I saw its prec. part a little darker 
than the whole spot; 0, grey; c, greyish red, northern edge of ¢ very bright. In 
3, white clouds, the prec. one next to the meridian brightest, the part of 2 following 
the red spot very bright. 
1881, January 30. 
No. 22.—L.=296°.16. T.=7h. 17m. 
Definition not good, image rather unsteady, 
S, just appearing as a very faint trace ; ¢, hardly much darker than 0, except 
towards its northern edge; 4, rather bright, especially next to c; d, very broad, 
gradually darker towards its southern edge. The three belts, 6, c, d, without 
special spots or marks. The features on the southern hemisphere extremely faint. 
The clouds in 3 not very distinct, the colours uniformly greyish yellow. 
No. 24.—L.=323°.14. ‘T.=8h. 1m. 
S decidedly dark red, uniformly coloured. Colours of belts not very distinct; ¢, 
slightly reddish grey, a little darker than 4; clouds in 3 rather indistinct. The 
whole dise greenish yellow. 
No. 25.—L.=344°.03. T.=8h, 35m. 
The prec. part of S seemed sometimes to be a little darker than the following 
one. Central cloud in 3 brightest. 
1881, February 5. 
No. 12,.-—L.=126°:00. T=7h. 31m. 
Very clear, bright moonlight. Jupiter very pale; c, bisected, northern part 
slightly reddish ; 0, a little darker in the two parts surrounding the cloud next to 
the central meridian, this cloud brightest in 3; 2, next to the southern edge of 6 
and especially 4, next to the northern one of ¢, rather bright. 
Plate XV. is, on the whole, a good reproduction of the original, but it is to be 
remarked throughout that the less prominent features of the planet's surface are 
too faint. Such is especially the case with— 
a, inall the drawings. There should be none where it is totally imperceptible. 
b, in Nos. 2 and 22 (where the whole of both these drawings should be darker), 
and in Nos. 9 and 23. 
e, in Nos. 8 and 10, 
In addition to this S should be slightly darker in Nos. 6 and 22, 
