M. S. Maier to R. L. Moore on Dust Counting Equipment (1954)

A three-page memo of May 19, 1954, from M. S. Maier to R. L. Moore, headed "Dust Counting Equipment," with copies to O. H. Cilley, Luttenberger and Stefl. Cilley had asked for an investigation of the dust counts throughout the mill and of ways to reduce the dust "for improved hygenic conditions." Maier reviewed the literature on impingers, cascade impactors, thermal precipitators and other instruments, and ranked the cascade impactor first and the impinger second.

What it shows

Maier noted that the mill's dust counts were made periodically by the Bureau of Industrial Hygiene and that dust counting was under study by the Air Hygiene Committee of the Asbestos Textile Institute. He wrote that "it has been reported that there is no unfavorable physical reaction from asbestos dust in the lungs which is under 10 microns or over 50 microns in length," so counts should aim at that size range. The memo shows a company engineer choosing equipment on the basis of that assumption.

In Johns-Manville's index

Johns-Manville's legal department indexed the Motley 1,000 in 1984. Its index describes this document as follows:

M.S. Maier memo to R.L. Moore, 5/19/54, entitled "Dust Counting Equipment." Maier indicates that O.H. Cilley (R-M) has requested that an investigation be made of the dust counts throughout the mill and possible methods of reducing the amounts of dust for improved hygienic conditions. The rest of the memo discusses the different kinds of dust counting equipment available.

About this copy

This is document 191 of the Motley 1,000, from the set the Manville Personal Injury Settlement Trust's records facility certified as true copies, pages CRMC-Motley1000-Subj-001260 to CRMC-Motley1000-Subj-001262.