Paper, 'Brevis commentatio de cobalto, auctore viro clarissimo' by Johann Heinrich Linck 'A short commentary on cobalt, by a very famous man.' Paper in Latin discussing cobalt and other precious gems and metals, including gold and sapphires. Subject: Mineralogy / Metallurgy Published in Philosophical Transactions as 'Brevis commentatio de cobalto, auctore viro clarissimo, Joh. Henr. Linckio, Lipsiensi, Acad. Cæsar. Leopold. Carolin. Natcurios. & Soc. Reg. Anglic. Sodale'. Read to the Royal Society on 12 January 1726. [1726]