Red, blue and yellow spectra, with the solar spectrum mb-artistname Charles Turner 'Jack Ketch executing sentence on

'Jack Ketch executing sentence on a culprit'

A couple in a buggy driving a miserable horse towards a 'cockney villa'

Italy from the valley of the Agri

Arch Bishop Boniface denouncing the anathema in Westminster Hall

Dual study of Indian cobra heads ('Naja tripudians')

Red, blue and yellow spectra, with the solar spectrum mb-artistname Charles Turner 'Jack Ketch executing sentence onFigures showing red, yellow and blue spectra with curves of maximum intensity (figures 1 3) and their combination into a solar spectrum (figures 4 5). Plate 2 from the paper 'On a new analysis of solar light, indicating three primary colours, forming coincident spectra of equal length', by David Brewster, originally published in Transactions of the Royal Society of Edinburgh, volume 12 (1834) pp. 123 136. Inscribed upper right 'PLATE II. Roy. Soc.