274 *OLAR MOTIOK. 



Investigation mcnt and extent ; and as a calculation of the required 

 ^ mi^^ ^f^th^ particulars will oblige us to fix upon a certain quantity, 

 sun. we shall take the motion that has been ascertained to be- 



long to the middle rank of the sidererl velo«ities for a 

 pattern. The result of the necessary calculations is a$ 

 follows ; 



