Malignant disease—continued 
cause of, 205 
chemotherapy, 210 
comparative biology, 236-237 
future of, 205 
future therapeutic approaches, 
209-211 
genesis of, 207 
immunology, 211, 214 
prophylaxis, 207—209 
radiotherapy, 210 
réle of tobacco smoking, 208 
surgical treatment, 209 
treatment of metastases, 209 
viral origin, 208 
Malnutrition, 25, 58 
Malthus, Thomas, 31, 244 
Man, possibilities in next 
thousand years, 337-361 
purpose of, 292 
ten 
Marsilid, 306 
Maternal age, effect of sex-ratio of 
births, 94 
Mechanization, effect on environ- 
ment, 147 
in towns, 14.4 
Medical science, and longevity, 218 
future developments, 195, 343 
promise of, 188 
Medicine, achievements of, 14 
diagnosis, 186 
progress of, 230 
use of computers, 160, 162, 182 
Memory, 266, 322 
chemical factors in, 310-313 
kinaesthetic, 346 
Meningitis, 201 
Meningococcal infection, 197 
Menstruation, effect of Enovid, 84 
Mental illness, 306 
Mental science, relation to mole- 
cular biology, 266, 267 
Mescaline, 307 
Metabolism, physiological, 3 
psycho-, 3 
Metals, contaminating food, 53 
Metchnikoff, E., 343 
Milankovich, 10 
Milk, consumption of, 33 

Index 
Mind, control of, 330 
development of, 317 
developing use of, 315 
function of, 300 
future of, 315-321 
misuse of, 316 
Mind-body problem, 299 
Minerals, requirements, 35 
Models, as predictors, 161 
function of, 157 
machines as, limits of, 165 
Molecular biology, 263-264 
Mongols, 212 
More, Sir Thomas, 362 
Muller, Hermann J., 247-262 
Mumford, Lewis, 11, 141, 150 
Muscle, biochemistry of, 191 
Muscular contraction, 191, 240, 241, 
301 
Muscular control, 348 
Music, 338 
Mutagenesis, as cause of ageing, 223 
Mutation, 238-239, 339, 353 
in stored spermatozoa, 278, 279 
rate of, 243 
Natural law, 291-292, 295 
Natural selection, 217, 238, 242-243, 
245, 246, 24.7, 274, 300, 326, 350 
cultural aspects, 249-251 
interference with, 254 
previous direction of, 248-251 
Nature, organization in, 191 
over-exploitation of, 5 
Negative feedback, 155 
Nervous system, effect 
additives, 52 
role in ageing process, 222 
Neurones, chemical changes in, 312 
Newton, Isaac, 188, 241, 34.2, 382 
No6osphere, 7 
Norethynodrel, as contraceptive 
agent, 82, 83 
19-Norsteroids, as contraceptive 
agents, 86 
Nuclear catastrophe, 338, 339 
Nuclear war, aftermath, 339 
of food 
407 
