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Locomotion
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Locomotion
National Railway Museum
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3
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Category
Meteorology
3
Object type
photometer
2
slide rule
1
Material
birch (plywood)
3
steel (metal)
3
alcohol
2
glass
2
metal plated (unknown)
2
paper (fibre product)
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polyurethane (varnish)
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brass (copper, zinc alloy)
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felt
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Photometer, marked: ā39 Gā
Pilot balloon slide rule Mk IVA
1965
Photometer, marked: ā34 Gā