Histoire de l’Académie Royale des Sciences, 1686, Tome II., pages 2, 3, 22: published in Paris in 1733.
Hovey, The Reverend Horace Carter. Celebrated American Caverns, Cincinnati, Robert Clarke, 1882.
Humboldt, Alexander von. Personal Narrative of Travels to the Equinoctial Regions, London, 1814, vol. I., pages 154-156.
Ice Trade Journal, Philadelphia, July, 1897.
Into the Schafloch: Temple Bar, London, November, 1861, vol. III., pages 393-401.
Jackson. Report of the Geology of Maine, 1839, vol. III.
Jars. Voyages Métallurgiques, 1774, vol. I., page 108.
Jarz, Konrad. Die Eishöhlen bei Frain in Mähren: Petermann’s Mittheilungen, 1882, pages 170-176.
Jungk, C. G. Ueber Temperaturerniedrigung bei der Absorption des Wassers durch feste Körper: Poggendorff’s Annalen der Physik und Chemie, 1865, vol. CXXIV., pages 292-308.
Kircher, Athanasius. Mundus Subterraneus, 1664.