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LORD BROUGHAM has recently been engaged in the investigation of a
peculiar phenomenon which he calls the "diflection of light." The
experiment itself consists in causing a ray of light to fall upon
the sharp edge of a knife or on the point of a needle; the ray is
thus "diflected" by the edge or point, and becomes prismatic. Lord
Brougham, in addition to other curious phenomena, has discovered that
the ray, when once diflected, cannot be again diflected in the same
direction, but may be diflected in an opposite direction.
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[FROM THE SPECTATOR, OF JUNE 15.]