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Record

  •   GB 0809 Ross - Ross, Col Sir Ronald (1857-1932)
    •   159 - Material on Ross' inventions including ear plugs and a clinical automatic thermometer
      • 01 - Material on the invention of ear plugs by Ross
Ref NoGB 0809 Ross/159/01/35
LevelItem
TitleLetter from Charles Baker, Scientific instrument makers
Date19/9/1911
DescriptionThey have sold a few ear clips and 'one or two customers have tried and returned them'. Suggest that an improved design is needed for them to be better received and ask for suggestions
AccessStatusOpen
LanguageEnglish
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