Colour vision [electronic resource] : being the Tyndall lectures delivered in 1894 at the Royal Institution (1895)
Abney, William de Wiveleslie, Sir, 1843-1920, Parsons, John Herbert, Sir, 1868-1957, donor, Institute of Ophthalmology, University College, London. Library Services · London : Sampson, Low, Marston & Company · leaf 117
Luminosity of a Feeble Spectrum, loi are reflected from glass mirrors Mi, M2 to apertures in opposite sides of the box, and from close to these … apertures by the right-angled prisms Pi P2, so as to fall on and cover S. Rods Ri, R2 are inserted in the
Ophthalmology · Eye · Color vision · Color Perception
Internet Archive · UCL Library Services, University College London (UCL) · Public domain (published before 1931). Free to use for anything.