Red, blue and yellow spectra, with the solar spectrum mb-artistname Charles Turner With figures including two soldiers

With figures including two soldiers on horseback

'Jack Ketch executing sentence on a culprit'

Italy from the valley of the Agri

'The Ladies Contrivance'

17th February 1966

Red, blue and yellow spectra, with the solar spectrum mb-artistname Charles Turner With figures including two soldiersFigures 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.