Document pmeN7y2QM44d8DpVn1yM7Jvw

jMcH, AW. ?.et: 1/615/59 DISTRICT HOSPITAL ............ -KAtGOOKLIE Date . . .-'Signet,,..1960. V>r. \ D. j.etham, Physician, Department of Public Health, 57 Murrav Street * PERTH.. near Or. Lethorn. W.idge t-Implnger. I would not claim that the Kidget-Trepinger is the "best instrument Tor use in dust-counting ir< the reining industry, hut in so far as the Asbestos industry is concerned it appears to be a great improvement on the Kbnimeter. Mr. Brisbane wrote me a fantastic letter, the gist of which was that the Konlroeter was the most practical latruzrent. Duet-counting was mainly of propaganda value and accurate estimations of concentration'* were impossible to obtain. ihis attitude may explain the significant failure of the tsinea Department to reduce the incidence of silicosis. Yours faithfully, J.McNultr Chest Physician VW-004080