General Index 



Vigour, 121 



environmental factors in, 129 

 genetic factors in, 121 ff. 

 hybrid, 127-30, 136 

 Viruses, in plant clones, 120 

 Vole, 27, 43, 44, 47, 80, 108-9 

 Vulnerability, increase in, 17, 18 

 Vulture, 50 



Weismann, August, 9, 37-8, 114, 



163, 189 

 Werner's syndrome, 135 

 Whales, 47, 54, 1 1 1 

 Wild populations, senescence, 108 ff. 

 Wolfhounds, Irish, 29, 44 

 Woman, post-reproductive period, 



177 

 Wound healing, rate of, 26, 156 



Warthin, 5 



Water-heavy, 7 



Water-beetles, 130 



Wear and tear, cellular, 2, 7, 140, 



162 

 Weight, organ, in rats, 26 



Yeasts, 165 

 'Yellows, June', 120 

 Young, reproductive preponderance 

 of, 39 



Zebra, Chapman's, 47, 48 



253 



