Proceedings of the American Academy of Arts and Sciences. 



Vol.55. No. 2. — December, 1919. 



A STEP FOmYARD IX THE METHODOLOGY OF NATURAL 

 SCIENCE (AN INTRODUCTION TO: THE FUNCTIONAL 

 RELATION OF ONE VARIABLE TO EACH OF A 

 NUMBER OF CORRELATED VARIABLES DE- 

 TERMINED BY A METHOD OF SUCCESSIVE 

 APPROXIMATION TO GROUP AVER- 

 AGES. BY GEORGE F. McEWEN 

 AND ELLIS L. MICHAEL). 



By Wm. E. Ritter. 



