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…these things, he cannot be ingnorant, that the process of Nature, which we have expressed in the exterior surface of the Mountain; but that it keeps the same course and tenour, or order, in its intimate and inmost Fire houses, or Receptacles. Corallary II. Hence it follows, That the food and fuel of Subterraneous Fire, follows the Motion of the Sea, raging…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/volcanoes/chapter6.php