Astronomy. 



[Lecture 19- 



TABLE of the magnitude of the sun and primary 

 planets compared with that of the earth. 



The density of the planets is calculated in the 

 same manner as that of the sun ; by the quantity 

 of their action one upon another. They are 

 found to be such as are expressed in the follow- 

 ing Table, and are compared with the density of 

 the earth taken for unity. 



