Document DDkZebRgyq84eDXLnKoOoMQ8N

u J. T. Hodgson and A. Daemon Table 14. (continued) Cohort identification Code Name General cohort notes > Fibre type Deaths By All Causes Obs Exp Mcaxulniioma inonuliiy 12 Paterson 13a SA amosite mines Reported .expected number reduced to estimate lire number relating to 10+ yr from first exposure (details in Appendix C) 13c SA crocidoliie mines 14 Massachusetts 13 Albin Mainly chrysolite (>95%). Expected number eslinuitcd from observed and all cause RR with smaller amounts of crocidoliie and amosite. Recent crocidoliie use 1 cl*, never > 3-4%. Up to 18% of amosite used briefly during the 1950s. It is not clear wliich ' umphibole should be seen as the most important - amosite because of the relatively high percentage used during a limited period or crocidoliie - because of its regular 16 Connecticut historic use at low levels. Data on men exposed< 1 year excluded Chrysolite was die only lyj>e of asbestos used until 1937 wltcn some anllui|ihytlite was added lur some product lines. About 400 lbs of crocidoliie was handled experimentally on a lew occasions in the laboratory, but only between 1964 and 1972. Given the small scale and liming of this umphibole use. the cohort has been treated ns chrysolite only 17 Ferodo Apart from two periods before 1944, when crocidoliie asbestos was used on one particular contract, only chrysotlc asbestos has been user]. i