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SUNSTONE, a felspar exhibiting in certain directions a brilliant spangled appearance, which has led to its use as an ornamental stone. The effect appears to be due to reflections from enclosures of red haematite, in the form of minute scales, which are hexagon ...

SUNSTROKE (Heatstroke; Insolation; Thermic Fever; Siriasis), a term applied to the effects produced upon the central nervous system, and through it upon other organs of the body, by exposure to the sun or to overheated air. Although most frequently observed in

TURNSTONE, the name long given l to a shore-bird, from its habit of turning over with its bill such stones as it can to seek its food in the small crustaceans or other animals lurking beneath them. It is the Tringa interpret* of Linnaeus and Strepsilas inlerpr