TABLE OF CONTENTS. 



PAGE. 



Introduction 55 



Influence of various conditions on nutrition of white rats 55 



Effect of long caging 55 



Monotony of diet 56 



Palatability of focd 56 



Physical texture of the food 56 



Digestibility of the food 56 



Need of " roughage " 57 



Inorganic constituents of the food 57 



Effect of extraneous and accidental factors 58 



Earlier experiences of the authors 59 



Prolonged maintenance on isolated food substances 59 



Relation of nitrogen balance to weight of rat 60 



Changes in the method of caging and feeding 60 



Alimentary bacteria and nutrition 61 



Addition of faeces to the diet 61 



Nutrition and growth 63 



Normal rate of growth of male and female white rat 63 



Normal growth as influenced by nutrition 64 



Relation of energy supply to growth 65 



Maintenance versus growth 65 



Relation of protein to growth 66 



Growth with insufficient food supply 66 



Experiments of Waters on cattle 67 



Experiments of Aron on dogs 68 



Measurements of poorly nourished children 70 



Suspension of growth on a maintenance diet 7 1 



Detailed measurement of stunted rats 72 



Underfeeding contrasted with a maintenance diet 74 



Effect of stunting on the growth impulse 75 



Realimentation of stunted rats 77 



Disproportionate growth 77 



Effect of partial starvation on body-weight 77 



Effect of partial starvation on nervous system 78 



Comparison of milk and mixed diet 79 



Preparation of "protein-free" milk 79 



Experiments with isolated proteins and "protein-free milk" 82 



Critique of the non-protein factors in the diet 82 



Adequate and inadequate proteins 83 



Discussion of the results and their bearings 84 



The charts and their explanations 86 



Index of charts with reference to food-mixtures and proteins fed 86 



in 



