LIST OF ILLUSTRATIONS 



Five portraits and nine plates (all inserts) 



No. I. SEPTEMBER, 191 1 



PAGE 



Portrait. Mrs! Ellen H. Richards l 



Plate I. Figures i-io. Tannin-colloid complexes (Lloyd) 40 



Plate IL Figures 11-24. Tannin-colloid complexes (Lloyd) 40 



Plate IIL Figures 25-34. Tannin-colloid complexes (Lloyd) 40 



Portrait. William H. Welker 136 



No. 2. DECEMBER, 1911 



Plate IV. Capsules of shark eggs (Hussakof and Welker) 221 



Plate V. A cage for metabolism experiments on goats (Rose) 226 



No. 3- MARCH, 1912 



Portrait. Joseph Lister 371 



Portrait. Waldemar Koch 372 



Portrait. Harvey W. Wiley 392 



Plate VI. Graph of the rate of reproduction of the lines of a pedigreed 



race of Paramacium aurelia (Woodruff) 399 



Plate VII. Photograph showing growth of oats in heated soils (Seaver 



and Clark) 424 



Plate VIII. Photograph of electrical baths for urea determination 



(Welker). 439 

 Plate IX. Diagram of the electrical connections on the regulating panel 



of the electrical baths for urea determination shown in Plate VIII 



(Welker) 441 



No. 4- JUNE, 1912 

 None. 



XVI 



