Roundel for use in optical experiments Size:XL: 80 x 80cm 1959 MGA Twin Cam

1959 MGA Twin Cam

One putto holds a scroll bearing the legend: 'Ecce Philosophorum Princeps'

the purple martin

Original is oil on panel 70x35

Bonaparte Crossing the Grand Saint-Bernard Pass

Roundel for use in optical experiments Size:XL: 80 x 80cm 1959 MGA Twin CamPlate 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