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Book IV. The Subterranean World (1678 ed.) by Athanasius Kircher, S.J. (1602-1680) Book IV. Pyrography, or the origins of underground fire. Section I. On the Nature of Subterranean Fire and its Operations. Preface LATIN transcription MUNDI SUTERRANEI LIBER QUARTU PYROGRAPHICU, DE IGNI SUBTERRANEI, Ventorum, Fluminum, Fontiumque origine. SECTIO Si. De Natura …
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