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"Simultaneous examination of three doctor of philosophy candidates."-​-​Gemology by J. Sinkankas, entry no. 2284.<div><br></div><div>"Discusses some general principles of chemical combination, alumina in gemstones, its isolation by chemical means, and the compositions of alumina-bearing gemstones as corundum, chrysoberyl, spinel, beryl, euclase, topaz, and garnets."-​-​Gemology by J. Sinkankas, entry no. 2284.</div><div><br></div><div>Partial contents: Cuius partem primam [...] pro gradu philosophico publico examini subjicit Andr. August. von Pfaler -- Cuius partem secundam [...] pro gradu philosophico publico examini subjicit Georgi​us de Besche -- Cuius partem tertiam [...] pro gradu philosophico publico examini subjicit Bened. Olav. Lille.</div><div><br></div>
<br>Subjects: Precious stones--Analysis</div>
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Gadolin, Johan, 1760-1852</div>
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