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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).
Letter to The A.T. Speedometer Co regarding a potential requirement for an experimental instrument.

Identifier  ExFiles\Box 59\2\  Scan094
Date  11th December 1930
  
The A.T. Speedometer Co
London, N.W.2.

11th December, 1930.

-2-

It is possible that we may require an experimental instrument with this figure in the neighbourhood of 795 and arranged with a special scale incorporating a contraction of the scale in the region of the higher readings in accordance with a parabolic law particulars of which we shall be able to give you.

Yours faithfully,

FOR ROLLS-ROYCE LIMITED.
  
  


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