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326                  Bibliography
Hodgson (John). 'Dissertation on an ancient cornelian. [In Archaeol., ii., 1773, p. 42.]
Holcomb (William Hartley). Precious gems and com­mercial minerals. . . . San Diego: Press of Frye, Garrett & Smith, [190-?] 28, [4], pp. Illustrations. 12°.
Hollandus (I.). Opera mineralia et vegetabilia. Arn-hem (Arnheim), 1617.
Hudlbston (W. H.). On a recent hypothesis with re­spect to the diamond rock of South Africa. [In Min. Mag., 1883, p. 199.]
Identification of Gems. [In Mineral Industries (annual), 1898, p. 278.]
Jacob (P. L.). Curiosités des sciences occultes; alchimie, médecine chimique et astrologique, talismans, amu­lettes, baguette, divinatoire, astrologie, chiromancie, magie, sorcellerie, etc. Paris, 1885.
Jacobs (H. and N. Chatrian). Monographie du dia­mant. Paris, 1880. A second edition in 1884.
Janettaz (N. and E. Fontenay, Em. Vanderhegen, and A. Coutance). Diamant et pierres précieuses. Paris, 1880.
Jannetaz (N.). Les diamants de la couronne. [In Sci­ence et Nature, 1884.]
Jennings (H.). The Rosicrucians. London, 1870. An­other edition, 2 vols., in 1887. Contains some re­ferences to the mystical lore of gems.
Jeffries (David). Treatise on diamonds and pearls, in which their importance is considered, plain rules are exhibited for ascertaining the value of both, and the true method of manufacturing diamonds is laid down. London, 1750.
------. Traite des diamants et des perles. Paris, 1753.
------. An abstract of the treatise on diamonds and pearls,
by which the usefulness to all who are in any way interested in these jewels will sufficiently appear, and therefore addressed to the nobility and gentry of this kingdom, and to the traders in jewels. London, 1754.
John (J. P.). Naturgeschichte des Succins, oder des sogernannten Bernsteins. Köln (Cologne), 1816.