Advertisement for Welsbach burners and gas mantles. Von Welsbach's incandescent mantle was tube of cotton impregnated with cerium and thorium oxide. The resulting rigid, brittle shape provided an efficient method of burning gas to produce a good light. Dated 20th century.
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Creative#:
TOP21947343
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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No
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