sca/e ofSo feet to t/fe inrh. The (in\m\'^ sliow ivhere /t (/e.^ee/n/s or ii.seen(L'> refluent water from that, becaufe thev are never turbid; becaufe they do not rife and fall in correfpondence with that in times of flood, or of drought; and becaufe the water is always cool. It Is probably one of the many refervoirs with which the interior parts of the earth are fuppofed to abound, and which yield fupplies to the fountains of w^ater, diftinguifhed from others only by its being acceffible. The vault of this cave is of folid lime-ftone, from 20 to 40 or 50 feet high, through which water is continually percolating.
This, trickling down the fides of the cave, has incrufted them over in the form of elegant drapery; and dripping from the top of the vault generates on that, and on the bafe below, ftaladites of a conical form, fome of which have met, and formed maflive columns.
Another of thefe caves is near the North mountain, in the county of Frederic, on the lands of Mr. Zane. The entrance into this is on the top of an extenfive ridge. You defcend 30 or 40 feet, as into a well, from whence the cave then extends, nearly horizontally, 400 feet into the earth, preferving a breadth of from 20 to 50 feet, and a height of from 5 to 1 2 feet. After entering this cave a few feet, the mercury, which in the open air was at 50^. rofe to 57^". of Farenheit's thermometer, anfwering to ii''. of Reau- mur's, and it continued at that to the re- moteft parts of the cave. The uniform temperature of the cellars of the obfer- vatory of Paris, which are 90 feet deep, and of all fubteraneous cavities of any depth, where no chymical agents may be fuppofed to produce a fadtitious heat, has been found to be lo*^. of Reaumur, equal to 54^-^. of Farenheit. The temperature of the cave above-mentioned fo nearly correfponds with this, that the difference may be afcribed to a difference of inftru- ments.
At the Panther gap, in the ridge which divides the waters of the Cow and the Calf pafture, is what is called the Blowing cave. It is in the fide of a