Engraving depicting Joseph Swans combined battery-powered safety lamp and fire-damp indicator which gave just over 1 candle power for 10 hours. The fire-damp indicator at the bottom was made of fine platinum wire and when fire-damp was present it glowed abnormally bright. Sir Joseph Wilson Swan (1828-1914) an English physicist; chemist and inventor. Dated 19th century.
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP29619172
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
Not Available
Property Release:
Not Available
Right to Privacy:
No
Same folder images: