In the Year 1664, after I had pass’d my several Examinations in the University of _Copenhagen_, and had deservedly obtained the Character, which is there call’d _Laudable_, by the Votes of my Judges, as well Philosophers as Divines, I prepar’d for my Return into my native Country; and accordingly put myself aboard a Ship bound for _Bergen_ in _Norway_, dignify’d indeed with various Marks of Honour from the Gentlemen of the several Faculties, but in my Fortunes quite impoverish’d. This was an Evil that attended myself as well as several of the _Norway_ Students, who return’d from the Study of the Arts and Sciences into their own Country stript of all they were worth. As we had a pretty brisk Gale, after a Voyage of six Days we arrived at _Bergen_ Harbour. Being thus restor’d to my Country, something wiser indeed, tho’ by no Means richer, I was supported for a Time at the Expence of my near Relations, and led a precarious Sort of Life, yet not altogether indolent and inactive. For in order to clear up by Experience some Points of natural Philosophy, the Study I had devoted myself to, I rambled over every Corner of the Province, with an insatiable Curiosity, to explore the Nature of the Earth, and to search into the very Bowels of our Mountains. No Rock so steep but I climb’d it; no Cavern so hideous and deep, but I made a Descent into it, to try if haply I could discover any Thing curious and worthy the Inquiry of a Philosopher. For there are a Multitude of Things in our Country of _Norway_, hardly ever seen or heard of, which if _France_, _Italy_, _Germany_, or any other Country so fruitful of the Marvellous, could boast of, nothing wou’d be more talk’d of, nothing more sifted and examin’d. Among those Things, which to me appear’d most worthy of Observation, there was a large and deep Cave upon the Top of that Mountain which the Natives call _Floïen_. And because the Mouth of the Cave us’d to send forth a gentle murmuring Sound, and that too by Intervals, as if by its frequent Sighs its Jaws were now shut, and now open’d; hence the _Literati_ of _Bergen_, and particularly the celebrated Master _Abeline_, and Master _Edward_, one of our first Geniuses in Astronomy and natural Philosophy, imagin’d this Affair highly worthy of a philosophical Inquiry; and since they themselves were too old for such an Enterprize, they excited the younger Inhabitants to a closer Examination of the Nature of the Cavern; especially as at stated Intervals, after the Manner of human Respiration, the Sound being sometime with-held issued out with a certain proportional Force.