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…all natural things, so of this Mountain also; try’d and experienced with great peril of his life. And to be short, All the matter of the upper part of the Mountain. Seem’d to be nothing else but a confused heap, and hanging of it self aloft, of Cinders, Pumices, and Stones, which they call burnt Coal-stones. Which seeing it is on every hand exposed, and…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/volcanoes/chapter6.php