GENERAL INTRODUCTION TO VITAMIN THEORY 23 



of, and developed around, the study of the antineuritic factor, we shall, 

 in the chapters which follow, discuss first the antineuritic vitamin B 

 (Bi), then vitamin G (B2) as the factor (substance or substances) 

 most directly dififerentiated from, and usually regarded as most closely 

 related to, vitamin B ; and then will follow, in what seems to be the 

 most logical sequence, the chapters devoted to the water-soluble vitamin 

 C and to the fat-soluble vitamins A, D, and E, respectively. 



