Document BRx9X7xqNavdMRdma4VmRGXZo

Jwm 30*. 1936 Hr, II R* Bassford . Lletropolltan Life Insurance Company Hen York City Hen York Dear Hr* Bassfords . In reply to your letter of Jim 22nd concerning Table 5* I think I can best give you the information by telling you precisely how It was collected* As I told you in m y previous letter* se now examine these men once a year* The Interval might bo ton months or it might bo fourteen* but It Is approximately a year between examinations* Thus a man who has been employed at this work for nine years for the purpose or our records'will have had an initial examination and nine subsequent examinati ..-ns* He will thus have had nine years of exposure* plus or minus a few months* This saja, criterion can be applied to the other groups as they are listed in Table 5 * with the exception that one year or leas includes all the men who had had an initial examination some months prior to the study of our records* Thus this group, may have anything from two or three months of exposure up to on year*, plus or minus two months* . It. Is*, of. course* our usual practice to set up a distribution with precisely limited dates* This was not dose in this instance because of the factor of variation of plus or minus two or three months* clear* I trust this will make the data entirely ` ' . In order to supply you with the finished data and with the text as finally corrected,, 1 am sending you herewith a copy of the printed article* Very truly yours* RAKjis