Subject: Cheshunt & Waltham Weekly Telegraph - Article re ERDE development of an instrument that can detect nitroglycerine. Photo b/w of G S Welby and Dr R J J Simkins with instrument. /2Also article re development of a combustible cartridge case.
Description: Cheshunt & Waltham Weekly Telegraph - Article re ERDE development of an instrument that can detect nitroglycerine. Photo b/w of G S Welby and Dr R J J Simkins with instrument. /2Also article re development of a combustible cartridge case.
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