. The Columbian magazine : or, monthly miscellany. ied repeatedly, andalways found this difference betweennight and day as to the height ofthe vapours. Another obfervationI made, which was their rifing high-er and ftronger in cloudy, fultryweather, than when the air was clearand ferene. This I am not able toaccount for unlefs the air is lighterthan when more clear, which is faidto be the cafe. My next attemptwas with fire, I got fome arms fullof light (liavings, and placing themlightly in the well-bucket, whichwas large, fet them on fire near thefurface of the foul air, if it may befo termed,
. The Columbian magazine : or, monthly miscellany. ied repeatedly, andalways found this difference betweennight and day as to the height ofthe vapours. Another obfervationI made, which was their rifing high-er and ftronger in cloudy, fultryweather, than when the air was clearand ferene. This I am not able toaccount for unlefs the air is lighterthan when more clear, which is faidto be the cafe. My next attemptwas with fire, I got fome arms fullof light (liavings, and placing themlightly in the well-bucket, whichwas large, fet them on fire near thefurface of the foul air, if it may befo termed, thinking to confume itsfurface gradually, and fo work down ;this, though a very tedious opera-tion, deftroyed it fo that I couldhear the ftiavings blazing when thebucket reded on the bottom of thewell. T then began to be in hopes Ifiiouldbe able to conquer the dampsand finifli my well ; but the next dif-ficulty was to clear the v/ell of thatvaft quantity of fmoke which it thencontained, which no way could beeffeded but by the ; but the. An Account offo7ne Remains of anct;Kt Works,the fmoke was no fooner cleared a- rifK itway than the dampi-eturnedfo ftrong more powerful meansthanhad as yet 423-but began to think of fome as not to be bore with. My fpiritsthen, after trying fo many things,began to fail as to the finifhing mywell, and I then fliut it up again, notknowing what more to do ; fomefew days after, meeting with an apo-thecary of my acquaintance, and re-lating to him the difficulty I hadmet with, he told me he could makewhat is called dephlogifticated air,which, beyond any doubt with him,would deilroy all thofe perniciousvapours, let them be of whatfoevernature they may be. 1 then beganto place fome confidence in what hefaid he could do, though quite un-acquainted with the procefs, whichwas to prepare a coal-fire in tliewell-bucket; this I did much to hisliking ;■ he then dropt a quantity ofnitre into the fire, after its explofionwas repeated federal times, h
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