240 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



iaim.i: XVI. 

 The Pi ma'.m.i i/in<. Factors in thb U\m.i •<! Practical Constancy, 



/.'. <-. Short Coil : 



TABLE XVII. 

 Principh of Step Method 



The figures in parentheses .'ire interpolated ; all others have be< n obtained e* 

 perimentally. For purposes of comparison, the values of I>u Bois are piven in 

 Table XVII. The numbers given in these tables represent N- 10*, a- in the 

 Liex tabL 



