PREFACE 



The Ciba Foundation, London, is an educational ^ah< 

 scientific charity founded by a Trust Deed made in 1947. 

 Its distinguished Trustees, who are wholly responsible for its 

 administration, are The Rt. Hon. Lord Adrian, O.M., F.R.S.; 

 The Rt. Hon. Lord Beveridge, K.C.B., F.B.A.; The Hon. Sir 

 George Lloyd- Jacob; and Mr. Raymond Needham, Q.C. 

 The financial support is provided by the world-wide chemical 

 and pharmaceutical firm which has its headquarters in Basle, 

 Switzerland. 



The Ciba Foundation forms an international centre where 

 workers active in medical and chemical research are encouraged 

 to meet informally to exchange ideas and information. It was 

 opened by Sir Henry Dale, O.M., F.R.S., in June 1949. 



In the first six years, in addition to many part-day discus- 

 sions, there have been 37 international symposia, each lasting 

 two to four days, attended by outstanding workers from many 

 countries. Other symposia are planned at the rate of five or 

 six a year. 



Early in 1954 the Trustees decided on special measures 

 designed to encourage, internationally, basic research relevant 

 to the problems of ageing. As part of this programme the con- 

 ference already arranged in that year on General Aspects of 

 Ageing was taken to be the first in a series of colloquia, to be 

 held annually. A second colloquium was organised in 1955, and 

 at the welcome suggestion of Professor E. C. Amoroso, this 

 one dealt with studies on the ageing of tissues, the normal life 

 of which is shorter than that of the organism as a whole. 

 It was hoped that inferences of more general value might be 

 made from researches on the ageing of the placenta, the repro- 

 ductive system, deer antlers, erythrocytes and so on. 



This volume contains papers and discussions of this second 

 colloquium, on Ageing in Transient Tissues, at which Professor 

 Amoroso graciously acted as Chairman. 



