200 



Subject Index 



Domestication, effect, 15, 37 

 Drosophila melanogaster, ageing 

 patterns, 24, 37 



Education, effect on performance, 



159-160 

 Elastase, 101-103 



and arterial change, 97-99, 136 



isolation from pancreatic tissue, 97, 

 101 



nature of, 97-98 



production, changes in, 45 



role in human organism, 101 

 Elastic fibres, adaptability of, 65 



structure, 102-103 

 Elastin, changes in composition of, 



98 

 Elastosis in skin, 66, 96-97 

 Electrocardiographic response to 



exercise, 74-75 

 Emotion, measurement of in ageing, 



170-182, 184 

 Environmental factors in ageing, 

 35, 37, 45, 171, 183-184 

 twin studies, 148 

 Enzyme production, decrease, 44- 



45 

 Epithelium, gingival, effect of 

 brushing, in Man, 55-57 



in Meriones libycus, 51, 57 

 Experience, human, effect of, 156- 



158 

 Eye changes, in malnutrition, 109 



Family relationship, and sampling, 



161 

 Fatigue, 150, 151 



Fatty acid interchange, effect of 

 ageing on, 49 

 role in cholesterol metabolism, 

 193-194 

 Fish, ageing patterns, 9, 15-16, 

 21-22, 25-26 

 survival curves 

 Fowl, domestic, fertility, 20, 21 

 Fruit fly (see Drosophila melano- 

 gaster) 



Gasterosteus aculeatus, ageing patterns 



and latitude, 26 

 Goats (see Capra) 

 Goatsuckers, ageing patterns, 28 

 Goldfish, lifespan, 9 

 Guinea pig, fertility, 20 



Guppies (see Lebistes) 

 Gynaecomastia, in malnutrition, 

 108-109 



Heat regulation, decrease in capa- 

 city of, 63-64 

 Homeostats, 43, 44 

 Horizontal studies, 94-95 

 Human function, tests, 73-91 



"mechanism", complexity of be- 

 haviour, 152-153 

 performance, age changes in, 149- 



169, 182-187 

 races, ageing patterns, 28 



incidence of disease, 113-134 

 Hummingbirds, ageing patterns, 28 

 Hypercholesterolaemia, 136-137 



Inbred strains, 6-8, 115-130 



and parabiosis, 116, 124, 127- 



129, 130 

 causes of death, 120-122 

 criteria for purity of, 116, 127- 



128 

 endocrine ovarian function in, 



119-120, 126-127 

 establishment of, 115-116 

 incidence of mammary carci- 

 noma in, 117,118-119, 120, 121 

 lifespan, 119-120 

 maintenance of, 116-119 

 pseudopregnancy in, 117, 126, 



129-130 

 survival curves, 13, 119 

 transplantation experiments ,116, 

 120, 122-123, 126, 129 

 Industrial studies, 164-167, 194- 



195 

 Insects (see Drosophila melanogaster) 

 Intelligence, measurement of in 



ageing, 170-182, 184, 186 

 Involutional psychosis, causes, 134 

 Iron, deposition in liver, 188-189 

 liberation from enzymes, 109, 

 111-112 

 Isotopic labelling, and renal blood 

 content, 52 

 and thyroid function, 52-55, 58 

 of Stentor, 46 



Jacob-Creuzfeldt's disease, 134 



Keratinization, and resistance to 



infection, 72 

 Kinetosomes, division, 46 



