Plate 10 from 'Contributions to the Physiology of Vision - Part the First'.

'Contributions to the Physiology of Vision - Part the First. On some remarkable, and hitherto unobserved, phenomena of binocular vision.' Paper on stereoscopy by Charles Wheatstone, read at a meeting of the Royal Society on 21st June 1838 and published in 'The Philosophical Transactions of the Royal Society', vol 128 (1838). Including a drawing of the first stereoscope, designed by Wheatsone (figs 8-9), a reflecting stereoscope characterised by two central mirrors.