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…various Receptacles of fire, within the bowels of the highest Mountains also; for the copleat fructifying of Nature with this primigenial heat as it were, and radical moisture together, as before has been shewn. For the fire cannot subsist without the water, nor the water without the fire. ‘Tis certain, if only the moist, or only the fiery element, should …
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/volcanoes/chapter2.php