296 



BIOLOGICAL PROBLEMS 



Diet, normal, 7; economy in, 12, 



1 6. 



Diseases of crops, 114, 115. 

 Distilleries, essential to bakers, 23, 



73- 

 Drainage, methods in agriculture, 



103. 



Energetics, laws of, 5. 

 Energy from breads, 36. 



requirements, 7. 

 Entomological experts required, 166. 

 Esparto grass, 232, 237. 



Eusol, applications of, 224. 

 Exercise and efficiency, 17. 

 Experiments on high extraction 

 flours, 34-7. 



Farmers, types of, 79. 

 Farming, evolution of, 76. 



strategy of, 75. 

 Fat, use of, 6, 8. 

 Fatigue, definition of, 248. 

 Flesh -formers, 8. 



Flour, production by roller-mill, 28. 

 Flours, varieties of, 30. 

 Flying, good reaction times desir- 

 able, 209. 



physiological aspects of, 195. 



position of machine in, 208. 



- temperament, 206. 

 Food and energy, 6. 



production, co-operation in, 177. 



the problem of, I. 

 Food-stuffs, value against beriberi 



and scurvy, 46. 

 Foul air, nature of its harmful effects, 



280-2. 

 Fresh air and efficiency, 269. 



air, benefit of, 17. 



- air, lack of, evil effects, 270. 



- air regime, 291-3. 



Fruit and fresh vegetables, anti- 

 scorbutic value, 50. 



- growing in America, 185. 



- trees, washes and sprays for, 142. 



Germ, fate in milling, 30. 



value in beriberi, 45. 



- value of, 33, 34. 



Gluten, loaf-making properties, 32. 



properties of, 23, 31. 

 Grading of fruit, importance of, 187. 



Grass-land and arable, 119. 



ploughing up, 1 1 6. 



Heat-giving food, 9. 

 Hourly output of fuse bodies, 252. 

 Human and animal food, relation of, 

 96. 



Ichneumons, parasitic on saw-flies, 



173- 

 Increased efficiency, causes of, 253. 



Industrial efficiency and fatigue, 247. 



farms, 86, 87. 



farms, objections to, 88. 

 Infant feeding, problems of, 58. 

 Insects in soil, great abundance of, 



175- 



Larch saw-fly and plantations at 



Thirlmere, 170-2. 

 Laying of wheat, 1 10. 

 Limitation of output, 261. 

 Lung capacity of aviators, 203. 



Malting, 71. 



Marram grass for paper-making, 240. 



Middleman, use of, 188. 



Milling of wheat, changes in, 26, 27. 



Mineral fertilizers, 105. 



fertilizers, amounts used, 106. 



Nervous exaltation of aviators, effects 



of, 197. 

 Nitrogen, in nutrition, 3. 



"Offals", 27, 34- 



Output in relation to hours of work, 



254- 

 Overcrowding and infection, 271. 



Over-fatigue in men, 251. 



in women, 248. 

 Overtime work, 260. 



Paper, early history of, 231. 



manufacture of, 236, 237. 

 Papyrus not a true paper, 231. 

 Pasture plants, selection of, 133. 

 "Physiological" school of wound 



treatment, 213. 



Pipe smoking a manufacturing pro- 

 cess, 230. 



Potato blight, spread of, in Britain, 



154, 155- 



