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 250
Fig. 126. … at films of liquid enclosed between two semi-cylinders of ebonite,II is a holder in which pieces of minerals can be clamped forobservation. Professor Bose has found that many crystalline andfibrous minerals, such as epidote and asbestos, polarise the electric
Light · X-rays
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