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…Fires and Flames; as it were the very Mouth of Hell; distant Eastwards, ten miles from the City Catania, situated at the foot thereof; From which it ascends by degrees, to so many miles height. Others reckon it fifteen miles from Catania: but indeed scarce ten English miles. And yet its full height in a direct, descent, according to its Axis, is…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/volcanoes/chapter6.php