A. F. Heinsohn to Sumner Simpson Comparing Manheim and Charleston Dust Counts (1939)

A one-page letter of June 20, 1939, from A. F. Heinsohn of Raybestos-Manhattan's General Asbestos & Rubber Division at North Charleston, South Carolina, to Sumner Simpson, the company's president, thanking him for the Manheim dust count comparison. Heinsohn set the 1939 Manheim figures beside North Charleston's last counts, made in 1936 and 1937 by Metropolitan Life and the State Health Department: lower at Charleston in most departments (card room 1.2 against 2.0, mule room 1.3 against 2.9), though higher in spooling and twisting (3.02 against 2.7).

What it shows

The two plants' managers were measuring themselves against each other in millions of particles per cubic foot. The Charleston figures came from Metropolitan Life's 1936 recheck survey (the report) and, for spooling and twisting, the South Carolina State Board of Health's 1937 counts made after an exhaust system was finished on the twisters.

In Johns-Manville's index

Johns-Manville's attorneys indexed the Sumner Simpson Papers. Their index describes this document as follows:

Acknowledges receipt of letter dated 6/16/39. Gives comparison between 1939 dust counts at Manheim and 1936-37 dust counts at Charleston. Charleston plant results are lower in most departments and improvements have continued to be made since last survey.

Related documents

• Sumner Simpson to A. F. Heinsohn Sending the Manheim Dust Count Comparison (1939)
• O. H. Cilley to Sumner Simpson on Manheim Dust Counts for 1935, 1938 and 1939 (1939)
• Metropolitan Life Insurance Company, Recheck Dust Survey of Raybestos-Manhattan's North Charleston Plant, with the 1934 Survey (1936)
• E. H. Jeffords to Sumner Simpson on the State Health Board's Second Dust Study at North Charleston (1937)

About this copy

This is document 04061 of the Sumner Simpson Papers, as numbered in the collection's index.