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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).
Page 2 of a letter asking a question about depositing lead oxide on spark plug electrodes.

Identifier  ExFiles\Box 150\1\  scan0150
Date  29th July 1936
  
-2-

Hs{Lord Ernest Hives - Chair}/Wst.1/JH.29.7.36;

(d) Can lead oxide be deposited on the electrodes in such a way as to raise the sparking plug voltage ?

Awaiting your reply.

Yours sincerely,
  
  


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