254 



Subject Index 



Retirement, effect on lire span. 41) 50 

 Rotifers, life-span, 241. 24:5 



Schizophrenics, aged, adrenocorti- 

 cal activity, 219-236, 287 

 Scientific achievement of aged, 40 

 Sea anemones, life-span, 244 

 Second childhood, 34 

 Senescence, definition, 31, 242, 243, 

 244, 245 

 and measurement, 4-14, 24 

 Senile dementia, 44, 45, 40 

 age changes in skill, 214 



elastosis, 101-103, 106, 108 



keratosis, 108 



osteoporosis, 110, 116-118, 121-122, 

 125 

 calcium balance, 123 

 Senility, mental, in centenarians, 25 



mental changes, 34 

 Sex difference in animal life-spans, 

 29, 180, 181 

 in 17-ketosteroid excretion, 139 

 in psychological age changes, 214 



distribution of lung changes with 

 age, 68 



hormones on calcium balance, 123 

 Sexual maturity and life-span, 29, 



30, 203 

 Sheep, usefulness in ageing research, 



182 

 Skilled action, age changes, 210-212, 



214 

 Skin, ageing of, 53, 54 



cancer, 53 



collagen in, 106, 107, 108 



creases, 12, 13, 23, 27 



elastic tissue in, 105, 106, 107 



elastoid degeneration, 53 



long-stored, autografts of, 170 



vascular lesions, 80-87 

 Social influences, 47, 49, 50 

 Specific growth rate, 6 



pathology of age, 54 

 Spermatozoa, long-storage of, 164- 



171 

 Spider naevi, 81-82 

 Starvation, late effects, 205 

 Steroid administration, effect on 



aged, 134-137, 138 

 Steroids, adrenocortical, bio- 

 synthetic pathways, 126-128, 133, 



134, 139 

 Stress, recurrent, 12, 13, 27, 65, 242 

 Survival curves, 239, 240, 243 



Teeth, retention of, on life-span, 13, 



242 

 Tentorium cerebelli, permeability, 



()9, 74, 75 

 Ti'trahijnicNd in nutrition researcli, 



186' 

 Thalamus, pathological studies in 



aged, 35, 36, 49 

 Time, conception of, age changes, 



217, 218 

 Tissue reserve, 55 



transplantation problems, 150, 154- 

 157 

 Tokophrya in ageing research, 187, 



191 

 Tortoise, endogenous ageing in, 28 

 Transplantation of long-stored skin, 

 170 



of long-stored ovaries, 165-166 



of ova, 150 



of ovaries, 150-154 



of tissues, prol)lems, 150, 154-157 

 Trauma, recurrent, 12, 13, 27, 65, 



242 

 Trout, usefulness in ageing research, 



29, 176 

 Trypsin in preparation of elastase, 



107, 108 

 Tumours in grafted ovaries, 153, 154 

 Turtles, usefulness in ageing 



research, 176 



Underfeeding, chronic, late effects, 



205 

 Undernutrition {see also Nutrition) 



of children, 194-199 

 Unicellular organisms, 55, 186 



187, 188, 191 

 Urinary disease, incidence in aged 

 18, 19, 20 

 metabolites in aged sehizof>hrenics, 



223-236 

 17-ketosteroids, changes with age, 

 126-127, 128, 140 

 sex difference, 139 

 Uterus, isolated, long-storage of, 

 166-167 



Vascular disease changes, and ageing 

 changes, 54, 55 



lesions of skin, 80-87 

 Venous lakes, 85 



stars, 82, 83, 86 

 Ventilation of ]>lood, 62, 63, 64, 



66, 68 



