Recent Changes in the Surface of Jupiter. 
By H. C. Russet, B.A., F.R.A.S., 
[Read before the Royal Society of N.S. W., 1 December, 1880.] 
gaze. 
The Sydney 114-inch equatorial is well adapted for such purpose, 
and freedom from uncorrected 
colour ; and in May, 1876, I therefore began a series of observa- 
m the sur 
clearly, and Sir W. Herschel saw the planet once in 1793 without 
belts being absent. : 
Cassini and others, judging of the condition of Jupiter from the 
Periods of rotation derived from different markings, came to the 
Conclusion that, since these times differed, the spots used in deter- 
Recht unen, must have a motion of their own, or that they were 
simply 
