August 25, 1911] 



SGIENGIS 



229 



when an elliptic integral, a differential 

 equation, or a Fourier series was used it 

 was assumed that the reader was familiar 

 with such. 



The results as shown in the figures will, 

 on comparison with similar figures accom- 

 panying an article in Science, October 22, 

 1909, in which a study of the calculus in 



//;/ Calcu/u3, En0./\Jm5 



Inf. Ca/cufu5,Eng/neer/ng 



