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 109
is a small glass tank containing the pale purple liquid 88 LIGHT LECT. known as Condys fluid (permanganate of potash); oninterposing it across the beam of light through the prismyou see (Fig. 52) that it cuts off the yellow and greenishyellow, but transmits red and orange at one end of thespectrum,…
Light · X-rays
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