Subject Index 



255 



Vital capacity of lungs, 58, 59, 0(5 

 Vitality factor in aj[»eing, 5, (5, 50, 57 

 nieasiued by adaptability, 24 



Vitamin B^.^, effect on growtii, 

 11)7-199 



Vitamin D and calcium absorption, 

 110-122 

 requirement in man, 128, 124 

 in rats, 124, 125 



Volume of lirngs, 5S, 59, 00. 05, 00, 



()8 

 Vulnerability as measure of 



senescence, 7-14, 28 



Water metabolism in age, 200, 207 



Work, loss of, 49, 50 



Wound healing as measure of 



senescence, 

 Wrinkles, 12, 18, 28, 27 



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