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…sixteen years in Scotland, and consum’d a large quantity of ground. Even as now some Coal-Mines about Newcastle are said to have continued burning for several years of late, and ‘tis likely do so still. In Germany, was violetn Eruptions formerly. Who in these latter Ages, hath ever heard, or read of such a Fire, issuing out of the Earth, as Tacitus…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/volcanoes/chapter4.php