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Bibliography of Precious Stones. 249
Leisnerus (Gott. Christ.), De Coralliorum Natura, Praeparatis et Usibus.                    Wittemlergœ, 1720
Lemnius (Levinus), Occulta Naturae Miracula. 8vo.
Antwerp, 1567
Lenk (J.), Neue Entdeckung eines Steines Serpentin-Agat.                                                        Wien, 1802
Leonardus (Camillus, M.D.), Speculum Lapidum. 4to.                                                          Venet. 1502
Leonardus (Camillus), Trattato delle Gemme che produce la Natura ; traduzione di M. Ludovico 8vo.                                                                    1565
Leonardus (Camillus), The Mirror of Stones, in which the Nature, Generative Properties, Virtues, and Va­rious Species of more than 200 different Jewels, Precious, and Rare Stones are distinctly described. 8vo.                                                      London, 1750
Loew, Ueber den Bernstein und die Bernstein-Fauna.
Berlin, 1850
Loninser (Gust.), Die Marmaroscher Diamanten. 4to.
Preslurg, 1836
Lucretius, De Rerum Natura, vor. ed.
Macculloch, (John, M.D., F.L.S.), Remarks on Se­veral Parts of Scotland which exhibit Quartz Rocks, and on the Nature and Connection of this Rock in general. Geol. Trans, i. 450.                               1811
Mackenzie (Sir Geo. Stewart, Bart., F.R.S.L. & E.), Experiments on the Combustion of the Diamond,