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Image
Has Image
6
Non-Commercial Use
6
Category
Heat
6
Maker
W and J George Limited
2
W. & J. George Ltd
2
Darker, William H.
1
Gibb Instrument Co.
1
Gibb Instrument Company
1
The Cambridge Scientific Instrument Company Limited
1
Viozone Limited
1
Viozone Ltd.
1
William H Darker
1
Object type
pyrometer (optical)
6
thermometer
6
pyrometer (optical); thermometer
5
oil lamp
1
pyrometer (optical); thermometer; oil lamp
1
Place
London
3
Birmingham
2
London, Greater London, England, United Kingdom
2
Birmingham, West Midlands, England, United Kingdom
1
Cambridge
1
Cambridge, England, United Kingdom
1
London, Greater London, England, United Kingdom; Birmingham, Borough of Birmingham, West Midlands, England, United Kingdom
1
Pittsburgh
1
Pittsburgh, Allegheny county, Pennsylvania, United States
1
Material
brass (copper, zinc alloy)
5
glass
5
nickel plated
3
copper (metal)
2
aluminium alloy
1
bakelite
1
cellophane
1
cotton wick
1
die-cast metal
1
plastic (unidentified)
1
Date
From
To
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'Pyroversum' (Temperature Indicator), 1920-1930
1920-1930