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LicenseThis image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseMedal commemorating Thomas Graham
Science Museum Group
© The Board of Trustees of the Science Museum
Medal commemorating Thomas Graham
Science Museum Group
© The Board of Trustees of the Science Museum
Silver tone [plated metal] medallion with glass cover and
Science Museum Group
© The Board of Trustees of the Science Museum
Silver tone [plated metal] medallion with glass cover and Parkesine mount commemorating the birth Dec 21st 1805 and death Sept 16th 1869 of Thomas Graham. / J.W. Minton Sc. [1869-70?]. diameter 45mm, in mount diameter 58mm. obverse only, Head to L relief profile, signed below. The chemist Thomas Graham (1805-1869) showed that hydrogen readily penetrated the crystal lattices of certain metals, a process he called 'occlusion'. Iron, platinum and especially palladium are affected. He supposed that hydrogen gas was the vapour of a very volatile metal hydrogenium which formed an alloy with palladium.
Details
- Category:
- Coins, Medals & Tokens
- Object Number:
- 1964-490
- Materials:
- silver, (plate?), Parkesine (xylotile) and glass
- Measurements:
-
overall: 45 mm,
- type:
- medal
- credit:
- McLachlan, T.
