300 COMPUTATION OF THE VALUES OF LOG G'~ 



3. The value of i/ the angle of the vertical has also been determined 

 by another approximate method depending on the development of 



in powers of x. 



To develope log, - (1 + e*) in powers of x. 



Or 



- &c. &c. 



Now substitute for e*, e 21 , e 3 *, &c. their developments in powers of x 

 and we have 



