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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 No
GB 0809 Ross/159/01/13
Level
Item
Title
Letter from W Watson & Sons Ltd, Scientific instrument makers
Date
15/9/1909
Description
They feel that their firm is too specialised to exploit Ross' ear plugs properly.
AccessStatus
Open
Language
English
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