PHYSICAL AND LITERARY. 203 



Art. V. 



Concerning the fudden and furprifing Changes 

 ohferved on the Surface of JupiterV BQ:h ;■ 

 b) the fame. 



THERE have been more fudden and 

 furprifing changes obferved on the 

 furface of Jupiter's body, than on any o- 

 ther planet in the iyftem. Caflini has ob- 

 ferved feveral belts rife on his body in one 

 hour's time ; and fpots, in very different 

 forms, are often feen upon him. 1 could 

 wifh that the pofition of his fatellites were 

 vi^W confidered when thofe changes hap- 

 pen : For, fince Jupiter has four moons, 

 fome of which are much nearer to him 

 than our moon is to the earth ; when they 

 are all in conjundlion or oppofition to one 

 another, very great tides mufl be pro- 

 duced in the ocean there, if there be any ; 

 and there is ground to fufpedt that thefe 



fudden 



