| Description | Correspondence with Alec M. Lodge, with note identifying correspondent and refering to Lodge's autobiography 'Past Years'.
/1 Letter from Alec M. Lodge to Oliver Lodge, written from L. P. Ltd, Rugby, dated 22 January 1925. Alec Lodge describes how the spark in the high tension cable between the magneto and sparking plug interfers with an aeroplane's wireless signalling and asks for advice regarding design.
/2 Copy of letter from Oliver Lodge to Alec M. Lodge, dated 3 February 1925. Lodge sends a detailed reply to Alec Lodge's enquiry. He explains the action of a spark and discusses possible methods of screening the magneto to prevent interference. |