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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/159/01/09
LevelItem
TitleLetter from Hawksley & Son, Surgical instrument makers
Date10/9/1909
DescriptionThey already make ear plugs of the type on a clip which Ross describes, but they find that plugs which are not on a clip, called Antiphones, sell better and encloses a leaflet (Ross/159/10)
AccessStatusOpen
LanguageEnglish
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