Document 2R0wpknZ2v22moyy2jZZV26Dp

i- i I 212.1 cools are more harmful than the bituminous coals, the soft coals, that came into being and has had wide currency, and that is Although, as I say, there was no direct evidence from their work, for this hypothesis because the anthracite mines were dustier than the steam coal, which, in turn, were dustier than the bituminous. Well, now, tO' go oh, owing to the very gr.ievous .situation in South wales, the Medical Research Council set up a special unit in' 1945, which I have had the pleasure and honor of being associated with since that time, and we have done a good deal of work into the epidemiological side - the epidemiological features of. this disease, I The work has been done by my colleague. Doctor Cochran; and X really feel rather shy coming here and talk ing to you about work he has done. All that I am going to tell you about has been work for which he has been respon sible and the credit goes to him and his team. The objective of this epidemiological work has geen, first, to try and see if we could get any explana tion for these epidemiological differences as shown by certification figures, and. secondly, to see if .we could guide dust suppression by establishing safe limits of dustiness. Now, the method -- next slide -- has been to study men and their dust exposure. Now, what 3ort of r.en I