Special Industrial Processes

Our plain-English summary of Special Industrial Processes, by R.T. Johnstone (1948).

The study

• Author: R.T. Johnstone
• Published: OCCUPATIONAL MEDICINE AND INDUSTRIAL HYGIENE, ST. LOUIS: C.V. MOSBY, PP. 461-492 plus Index (1948)
• Type of article: Book excerpt
• Our copy: from Johns-Manville's own medical library.

In plain English

This is a chapter from an occupational medicine textbook by R.T. Johnstone, not a research study. The author stated that its purpose was to describe common industrial processes for physicians who might not otherwise understand them. The chapter covered electroplating, anodic treatment of aluminum, degreasing with trichlorethylene, pickling, heat treatment, sand blasting, shot blasting, tumbling, casting, ceramic and pottery work, diesel engines, fluorescent lamps, storage battery manufacture, welding and metallizing, with notes on hazards. Its only mention of asbestos was in the welding section. There the author wrote that asbestos fiber or twine and other mineral silicates were often included in the coatings of steel welding rods. No asbestos fiber type was named and no asbestos-related disease was discussed in this chapter. The chapter named silica as the hazard of sand blasting and foundry sand, and silica and lead as the main exposures in ceramic work. It also described one case known to the author in which a workman suffered severe intoxication while degreasing over an unventilated open tub heated by a fire. The chapter reported no study data on asbestos.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Textbook chapter describing industrial processes and their hazards (not a research study)
• Who was studied: No study population; the chapter described common industrial processes for physicians
• Exposure: Various process exposures. Asbestos appears only as asbestos fiber or twine in the coatings of steel welding rods; no fiber type named
• Main results:
  • The author wrote that asbestos fiber or twine and other mineral silicates were often included in steel welding rod coatings
  • The chapter cited Tebbens and Drinker as finding no crystalline quartz in the fumes of steel electrodes (another work's finding, cited here)
  • The silica content of sand was described as what makes foundry work dangerous
  • Silica and lead were named as the two main exposures in the ceramic and clay products industry
  • The author described one case in which a workman doing makeshift trichlorethylene degreasing suffered severe intoxication
• The authors' conclusion: No formal conclusion. The author's stated aim was to help physicians understand industrial trades so that asking about a patient's occupation yields useful information

Topics

Medical terms in this study, explained in our Lexicon: Silicate.

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