3 items Collection of documents relating to the Portsmouth-to-Admiralty semaphore line designed by Sir Home Riggs Popham
105 Portrait photograph of Professor John Hopkinson, Professor Wilson and senior students at King's College, London
6 pages Pages from The Kaleidoscope Periodical, "being a Biographical Sketch of that celebrated Aeronaut, [William Wyndham Sadler] and a narrative of the events which led to the melancholy catastrophe of his death"
2 items Manuscript maps of the earth projected on a regular dodecahedron and on a regular tetrahedron
A collection of glass lantern slides capturing the development of flight from an early set of images from the 1909 aviation meeting held at Reims, France through to images of aircraft from Imperial Airways and flying boats in the late Thirties. The History of Aircraft and Flying
2 items Extracts from correspondence relating to the installation of a steam engine at the Royal Foundry, Woolwich Arsenal