Duchy of Carniola
Oryctographia Carniolica (Carniolan Mineralogy; with the subtitle 'or a Physical Geography of the Duchy of Carniola, Istria, and in Part the Neighboring Lands') is a four-volume work by Belsazar Hacquet, published in Leipzig in 1778, 1781, 1784, and 1789. It discusses the physical properties of the Duchy of Carniola, Istria, and parts of the neighboring lands. It also includes an in-depth description of the Idrija mercury mine.