Roundel for use in optical experiments Robert Waring Darwin

Roundel for use in optical experiments by Robert Waring Darwin

Fine art poster
Fine art poster

  • Amazing giclée print quality
  • 280gsm thick fine art print paper
  • 100+ year colour guarantee
  • Dimensions:
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    • x cm excluding border ( x in)
£14.95

Framed picture
Framed picture

  • Premium wooden frame with a thick bevel-cut mount
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Canvas
Canvas

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  • European kiln-dried knotless pine
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Postcard
Postcard

  • Printed on 320gms thick watercolour paper
  • Blank reverse for your own message
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Greetings card
Greetings card

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  • Supplied with envelopes and protective cellophane sleeves
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Roundel for use in optical experiments

Plate 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 spot, and then closing your eyes, and applying your hand at about an inch distance before them...you will see the most beautiful circles of colours that imagination can conceive, which are most resembled by the colours occasioned by pouring a drop or two of oil on a still lake on a bright day."

Original: watercolour on paper. 1785

  • Image reference: RS-9947

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