[6] The word paste is derived from the Italian, pasta, food, being suggested by the soft plastic nature of the material used to imitate gems.
[8] The least and the greatest of the refractive indices of doubly refractive species are given.
[9] The dispersion is the difference of the refractive indices corresponding to the B and G lines of the solar spectrum. The value for crown-glass is ·016.
INTERESTING AND IMPORTANT BOOKS
JEWELLERY. By Cyril Davenport, F.S.A. With a Frontispiece in Colour and 41 other Illustrations. Second Edition. Demy 16mo.[Little Books on Art.
JEWELLERY. By H. Clifford Smith, M.A. With 50 Plates in Collotype, 4 in Colour, and 33 Illustrations in the text. Second Edition. Wide royal 8vo, gilt top.[Connoisseur’s Library.
GOLDSMITHS’ AND SILVERSMITHS’ WORK. By Nelson Dawson. With 51 Plates in Collotype, a Frontispiece in Photogravure, and numerous Illustrations in the text. Second Edition. Wide royal 8vo, gilt top.[Connoisseur’s Library.
EUROPEAN ENAMELS. By H. H. Cunynghame, C.B. With 58 Illustrations in Collotype and Half-tone and 4 Plates in Colour. Wide royal 8vo, gilt top.[Connoisseur’s Library.