Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Laboratory report with two microscopic images showing an oxidised seam in a spring at different magnifications.

Identifier  ExFiles\Box 119\1\  scan0206
Date  11th May 1939
  
ROLLS-ROYCE LABORATORY REPORT: HL./EJW. 3/JM.{Mr Morley} 11.5.39.

M.1840/6. X 250.
Oxidised seam in 13.hr. Spring.

M.1840/7. X 950.
As M.1840/6. but at higher magnification.
  
  


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