RECENT CHANGES IN THE SURFACE OF JUPITER. 71 
lanet, and in some way connected with the white spots, for I 
have observed that in four instances certainly, and I think in 
every one, where a spot is visible, there is always to be found on 
the preceding side of it a cloud-like form, which extends into a 
diagonal, the end near the spot being the preceding end; in one 
or two instances the existence of a diagonal in a particular place 
mountains. The is insufficient to convince one, but quite 
enough to make the suggestion, and to lead to the hope that we 
shall know more about it These markings seem much more 
eas 
of their number I may mention, that at ten minutes past 8 p.m. 
on September 19, 1878, I saw no less than five well-defin 
diagonals extending from the south belt towards the north 
one, and one coming from the north towards the south: at 
this time the red spot was just passing off the planet, and next 
night I examined the part before the spot and found similar 
rks extending at least one-fifth of Jupiter’s circumference, so 
that at that time almost the only markings between the belts were 
diagonal 
which it cut half in two; it looked like a mass of cloud, more 
& " 
Tt i easy a Be lar but exceedingl 
difficult to ebbedsse ss CBbabe? i th dark shade. 
