tical procedure, It will have information of value for — various things, In the field of general concern with end a results we have, of course, the continued interest ia the patients sous of whoa are the survivors of the orivinal 1 tel painters in the Hew Jersey factories snd another ; ou composed of those who in the thirties vere given actual injections of radium selt in the hope that £¢ would do sc thing good for them, It was a misguided and entirely, I [| think perhaps you would ssy unethical type of medical prac tice wilch wos Linited to a very msll area of the coun but we are indebted to that snfortunste episode for sane extrenely valuatle inforration that is now developings ficulty in all this erea is that the period ef induction¢ the anatanical resulta, whether its a tuor or severe en may be rather long. In the case of the Ceochoslovakian miners, for example, it was an average of 17 years fc the dbegiming of exposure of the nines before cancer af tin | lungs was finally recognised, In the case of thenickele Oo carbonyl, workers in England it has been about 13 years, of thet the tine span bere beccnes @ very isportant sort of things We therefore atterpt to acquire as mich ofthis specific information as we can ami alse we would on: ik Like to make it clear thet the conclusions ef conferences acts as these also serve to orient the emphashs that we've placed on 3 the research procran for the future so this is a feedback 149