Remarks on the Colours of J upiter’s Belts, and some 
changes observed thereon during the opposition 
of 1880. 
By Geo. D. Hirsr. 
[Read before the Royal Society of N.S.W., 1 December, 1880.] 
T am not able, I am afraid, to add much of interest to the paper 
just read by Mr. Russell. My own observations of Jupiter this 
Opposition have not been anything like as complete as I could wish, 
A long spell of cloudy weather when the planet was in its most 
ae . : 
especial atten 
the colours of the belts and polar regions. For this work tl 
Silvered glass reflector is particularly suitable, on account of its 
mati 
ism. 
The following is a brief review of some of the salient features 
of the planet noted during the last three months :-— é 
North polar shading :——This maintains the fine sea-green tint 
noted by me first in 1876, but the colour is more pronounced. I 
red to 
: light- ; 
siderably in colour, on some occasions appearing almost — 
and very ragged ; a large black spot has been noted on it of an “ 
defined form ; it seems subject to rapid change, as after an Interv: 
