ILLUSTRATIONS. 



Page. 

 Plate I. Fig. 1. — Flour particles from straight patent flour No. 240. Fig. 2. — 



Flour particles fmiii entire-wheat flour No. 241 4S 



II. Fig. 1.— Flour i)articles from graham flour No. 24:i. Fig. 2.— Feces 



from bread from straight patent flour 48 



III. Fig. 1. — Feces from bread made from graham flour. Fig. 2. — Feces 



from bread made from entire-wheat flour 48 



6 



