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$Optics: diagrams of reflection and refraction of light. Coloured engraving by J. Pass, 1820.$
$An eye in a star, the spokes of which divide the spectrum of colours; putti hold a prism, a telescope, a rod refracted in water, and a camera obscura; representing optics. Engraving by J. Chapman, 1820, after A.D. Macquin.$
$An eye in a star, the spokes of which divide the spectrum of colours; putti hold a prism, a telescope, a rod refracted in water, and a camera obscura; representing optics. Engraving by J. Chapman, 1820, after A.D. Macquin.$
$Optics: interference phenomena, exhibited by diffraction gratings. Coloured mezzotint by M. Rapine [1883], after B. Desgoffe.$