The Primary Planets. 



291 



TABLE of the diameters of the sun and the pri- 

 mary planets in terrestrial diameters, and in 

 leagues of 2283 French fathoms each. 



The magnitude of the planets compared with 

 one another, are as the cubes of their diameters. 

 We have seen in the preceding table the size of 

 their diameters compared with that of the earth ; 

 by cubing them, therefore, we shall have the size 

 of the planets themselves, compared with that of 

 the earth, which is regarded as unity. 



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