General Repertory of Mineralogical, Mining, and Salt Works Literature

§. 12.

Double-Refracting Spar Also known as Iceland Spar/Calcite.

1. Erasm. Bartholinus, Experiments on the double-refracting Iceland crystal, in which a wondrous and unusual refraction is discovered original: "Experimenta Crystalli Islandici Disdiaclastici, quibus mira et insolita refractio detegitur". Copenhagen. 1670. 4to. 60 pages, with copperplates.
——— Copenhagen. 1690. 4to. 60 pages, with copperplates.
2. Treatise on Light and the reflection of Iceland crystal, by Christ. Huygens. Leiden. 1690. 4to.
3. Samuel. Duraeus, Dissertation on the refractions of Iceland crystal, Respondent Erasm. Malm. Uppsala. 1761. 4to. with copperplates.
4. Observations concerning the double refraction of Rock Crystal, by Giov. Bapt. Beccaria. Turin. 1764. 4to. 2 sheets.

Precious Stones in General See also Mineralogy, Part I, §. 8, no. 4; §. 29, no. 15; §. 38, no. 1; §. 126, no. 1, 2, 3; §. 148, no. 9; §. 250, no. 11; §. 275, no. 74; Part II, §. 7; §. 7b; §. 11; §. 24; §. 40b; §. 50; §. 52; §. 248, no. 1; §. 329, no. 47, 146. — Mining Science, Part I, §. 11, no. 1; §. 28, no. 5; Part II, §. 133, no. 1; §. 140, no. 19.

§. 13.

Section I,

German Writings.

1. An old German didactic poem on precious stones. Erfurt. 1498.