98 SOME NOTES ON JUPITEE DURING HIS OPPOSITION OF 1876. 



Me. Hiest said that, as to tlie sudden disappearance of some 

 of tlie markings, the remark of Mr. Eussell was hardly borne 

 out by some existing observations. Sir James South mentioned 

 that a black patch on Jupiter, representing a space on the planet 

 22,000 miles in diameter, totally disappeared in the course of a 

 few minutes. Such a conspicuous marking could scarcely be 

 blotted out in a moment by bad definition. 



