Contents ix 



PAGE 



The metabolism of senescent leaves 



by E. W. Yemm . . . . . t 202 



Discussion: Bourliere, Huggett, Krohn, Montagna, Row- 

 lands, Villee, Williams, Yemm ..... 210 



The physical instability of human red blood cells and its 

 possible importance in their senescence 



by J. E. Lovelock ....... 215 



Ageing in human red cells 



by P. L. Mollison ....... 233 



Discussion: Amoroso, Dempsey, Huggett, Krohn, Mollison 

 Montagna, Parkes, Rowlands, Tuchmann-Duplessis, 

 Villee, Williams, Wislocki, Yemm .... 239 



General Discussion: Amoroso, Bourliere, Corner, Dempsey, 

 Fawcett, Huggett, Jost, Krohn, Montagna, Parkes, 

 Villee, Williams, Wislocki, Yemm .... 246 



.V, 



• • « I I «i •> <t » » ' 



