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Model of double screw propeller

Model of double screw propeller

1836
Model of vessel S.S. 'Francis Smith' with screw propeller

Model of vessel S.S. 'Francis Smith' with screw propeller

1836-1857
[Correspondence, chiefly of (Sir) Francis Pettit Smith, curator of the Patent Office Museum, concerning the suggestion that a photographic process had been invented and used at Soho House in the 1790s. Comprises ca.160 items, 1862-1873. The correspondence relates to seven 'Sun Pictures' now in the Science Museum's Collection (inv. no. 1884-16) five of which have been identified as 'mechanical paintings', executed between 1778 and 1781 by an unpatented process of James Watt's partner, the entrepreneur Matthew Boulton, and his craftsman at the Birmingham Soho Works, Francis Eginton. The process is significant for its use of an albumen surface and may be regarded as aquatint at an intermediate stage ready for transfer printing processes akin to to those used in ceramics. Listing available. See also below]

[Correspondence re 'Sun Pictures']

1862-1873