TBAlifSLAJOR^S NOTE 



It is with the deepest gratitude that the translator ack- 

 nowledges the inestimable assistance »f Professors Jones and 

 Hmnphrey of the University of Wisconsin and their students, 

 Messrs, Yaznpolsky and Drechsler, who have criticized the man- 

 uscript as to technical rendition and general form, 



December 1913 



