Roundel for use in optical experiments Size:XL: 80 x 80cm Interior view of the theatre

Interior view of the theatre

Bonaparte Crossing the Grand Saint-Bernard Pass

1959 MGA Twin Cam

Campbell (second from the left)

Original is oil on panel 70x35

Roundel for use in optical experiments Size:XL: 80 x 80cm Interior view of the theatrePlate 9 figure 2 from the paper "New experiments on the ocular spectra of light and colours", by Robert Waring Darwin, Philosophical Transactions of the Royal Society, vol. 76 (1786), pp. 313 348. Roundel intended for use in exploring colour perception. In the written experiment circular pieces of silk are overlaid in the sequence blue (outer), yellow, pink, green and indigo (inner) with a central spot. "look steadily for a minute on this central