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Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)

Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 64

An illustration from Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896, 1897, leaf 64 — Fig. 29. I LIGHTS AND SHADOWS 47 persons have the cartilaginous walls of the eyeballs too … Fig. 30. thick. Stand in front of a mirror, close one ey say the right—and hold a candle in the hand on same side. Hold the candle about at the level of the closed eye so that its light just falls across the bridge of the nose into the open eye. Then if you look very carefully you will see, right…

Light · X-rays

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