"Typus Communicationis Maris Caspii, cum Persico et Euxino", Kircher, Athanasius

This interesting little map covers the region including the Black and Caspian Seas and the Persian Gulf with a system of underground canals connecting them. The only city shown is Constantinople. This is from Kircher's masterpiece, an immense and amazing work covering all aspects of anything that dwelled or occurred within the earth's interior - from dragons, to fossils, to mountain springs, earthquakes, and volcanoes. Kircher's work was the first serious effort to describe the physical makeup of the earth, proposing theories (sometimes fantastic) in the areas of physics, geography, geology, and chemistry. He suggested the existence of a vast network of underground springs and reservoirs, as well as the theory that subterranean temperatures increase directly in proportion to depth. Published in a Dutch edition of Kircher's famous Subterranean World. On a full sheet of Dutch text measuring 9.6 x 10.6".

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Condition: A

A nice impression with a couple of spots of foxing in the blank margins and some mildew stains along the edge of the sheet at top right.