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description

Summary

The large drum, containing the ingredients, is attached to the tumbling mechanism at lower right, and the asbestos-lined cover (upper right) is lowered over it. As the drum is rotated by the tumbler at 12 rpm, the contents are heated to 60 degrees Celsius by infrared lamps within the asbestos-lined cover.

Nothing Found.

label_outline

Tags

leather leather shoes national bureau of standards national institute of standards and technology high resolution ultra high resolution
date_range

Date

1955
create

Source

National Institute of Standards and Technology
link

Link

http://commons.wikimedia.org/
copyright

Copyright info

Public Domain

label_outline Explore Leather Shoes, National Bureau Of Standards, National Institute Of Standards And Technology

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Experts at Bureau of Standards study effect of corrosive soils on specimens of pipe. Washington, D.C., Aug. 8. Of interest to home builders the country over is the study being made by experts at the National Bureau of Standards of the effect of corrosive soils on pipes and protective materials. Samples of pipe which have been buried for four years in fifteen soils differing widely in their characteristics, are being tested. Included are several varieties of ferrous materials as well as copper, brass, and bronze. Soldered and brazed joints, protective materials, and pipe made of a composition of cement and asbestos are also represented. Walter Johnson, of the Bureau, is pictured removing graphitic corrosion from cast iron with an air-driven tool. The corrosion products are too hard to be removed with a brush or by chemical treatment, 8/8/38

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Topics

leather leather shoes national bureau of standards national institute of standards and technology high resolution ultra high resolution