Impressed by the exhibition of photography at the Great Exhibition of 1851, English meterologist and aeronaut James Glaisher proposed that microphotography be used as a method for document preservation. According to the Wikipedia article on Microform, astronomer and photography pioneer Sir John Herschel supported this view in 1853.
Great Exhibition of the Works of Industry of All Nations of 1851. Reports by the Juries (1852). Carter & Muir, Printing and the Mind of Man (1967) no. 331.