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Image
Has Image
3
Non-Commercial Use
3
Category
Heat
3
Maker
Langley, Samuel Pierpont
2
Samuel Pierpont Langley
2
Callendar, Hugh Longbournee
1
Hugh Longbourne Callendar
1
Object type
bolometer
3
bolometer; measuring device (radiant energy)
3
measuring device (radiant energy)
3
Place
Allegheny City
2
Allegheny City, Pittsburgh, Pennsylvania, United States
2
England
1
England, United Kingdom
1
Material
brass (copper, zinc alloy)
3
plastic (possibly vulcanite)
3
platinum (metal)
3
copper (metal)
1
iron
1
leather
1
wood (unidentified)
1
Date
From
To
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Langley's 'Great' Bolometer, 1880-1890
1880-1890
Langley's Bolometer, 1880-1890
1880-1890
Callendar's Absolute Recording Bolometer, 1905
1905
