Thermal Syndicate Ltd, Vitreosil, 1925. (with enclosures) Vitreosil was a form of fused quartz (silicon dioxide) which had a variety of industrial and commercial applications. Extremely durable, it was used for both scientific apparatus and decorative ware.
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- ReferenceGB 133 HUT/A/7
- Dates of Creation1925
- Physical Description1 item some wear and wear of covers