INDEX 
Tagore, 85, 94, 118 
Timber supplies, 45 
Treitschke, 97 
Ultimate population of world. 
See World’s possible . . 
Verkulst, 43, §3 
Waksman, 41 
Walker, 58 
War, 84, 86, go, 97 seg, 119 
Wheat, yield per acre of, 39 
Woolfe, 55 
World’s possible future and ulti- 
mate population, 12, 48 seg. 
51 seq., 65 5¢g., 90, 116 seq, 
Yield of cereals per acre, 39, 40 
Yule, 54 
Printed and Made in Great Britain 
by Turnbull &° Spears, Edinburgh