The transept of the Crystal Palace under construction, Hyde Park, London, 1850.
© Science Museum / Science & Society Picture Library
Plate from the Illustrated London News (Vol 50/2 p 453). As part of the preparations for the Great Exhibition of 1851, the semi-circular ribs of the transept of Crystal Palace are raised from above. The curvilinear roof was designed by Joseph Paxton (1801-1865) to provide a 'proper diffusion of air' to the large elms in Hyde Park to allow them to survive beneath the glas.