LIST OF ILLUSTRATIONS 



Plate. Photograph of mice . . Frontispiece 



PAGE 



Figure 1. Survival periods of mice on diet of 

 zein and tyrosine and zein and 

 tryptophane .... 140 



Figure 2. Growth curve of normal white rats 144 



Figure 3. Growth curve with casein and milk 



diets 144 



Figure 4. Growth curve with milk diet . . 145 



Figure 5. Maintenance on casein and growth 



after addition of protein-free milk 146 



Figure 6. Resumption of growth after addi- 

 tion of protein-free milk to casein 

 diet 147 



Figure 7. Failure of growth on gliadin plus 



protein-free milk . . . 149 



Figure 8. Recovery of the capacity to grow 



after a period of stunting . . 150 



Figure 9. Maintenance and fertility on a 



gliadin diet . . . .151 



Figure 10. Indispensability of lysine for 



growth 153 



Figure 11. Failure of zein to maintain or pro- 

 mote growth .... 154 



Figure 12. Indispensability of tryptophane for 



maintenance in nutrition . .156 



Figure 13. Growth on diets containing zein + 



tryptophane + lysine . .157 



