Francis Pettit Smith, curator of the Patent Office Museum: corresp rel to possibility of a photographic process having been used at the Soho Works of Boulton and Watt (MS 2117)
British Vacuum Cleaner Co Ltd: photograph album, incl photos of early appliances and factory (MS 699)
Album of photographs (c100) of airships, their hangars, construction and use, and parachute preparation and use (MS 701)
Lithographic design drawings (22) of the Neale Aerial Warship 1917-18 (MSP 69)
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