CHAIRMAN^S OPENING REMARKS 



J. F. Danielli 



The investigation of problems of ageing is still in its early 

 stages. One major reason for this is that observations must 

 be made on old animals, which are not readily come by. A 

 research worker in this field must have patience above average, 

 or he will not wait until his animals are sufficiently old. And 

 he must have money above average, or he will not be able to 

 afford to keep his animals sufficiently long. Even where 

 patience is available, the money is usually not. 



In view of this, we must remember that, where data pre- 

 sented in this colloquium seem inadequate, it is usually the 

 cost of getting better information which is the main restricting 

 factor. 



This colloquium arose largely as a result of the enthusiasm 

 and initiative of Alex Comfort, and despite the seeming 

 paucity of data the contributors appear to have succeeded in 

 producing a fascinating group of papers. 



AGEING — ^V — 1 



