De ee ee re Ae tee ie ee he hy 
GROTTO. 
have their current through them: when the water had 
no fiffures, they remained entire ; and fo formed there very 
Oo much wondered at. 
of an amazing beauty. 
Ser perc Mem. Acad. anno 17, Ze 
At ‘oligno in Italy, is another grotto, confifting of pil- 
lars and orders of architeGure of marble, with, their orna- 
arniola, famous for 
teeds fr me fubterraneous grotto, or lake; as it is 
No 
| Grorro, in Geology, is a term frequently applied to the 
natural caverns, opens, and thake-holes, whic 
$ 
he immenfel ces which are thus. found 
ecm depths below the furface, have much puzzled 
i le arned to account £ r_ their formation: fome have fup- 
, geen little appearance of probability, that the lime- 
und runnin ‘through them. Mr. Farey, who has 
€ntion to this fubjeét, and prepared a lift ofall 
“ipal Caverns in or near to Derbythire,. fo: 
3248 of opinion that the mineral veins both of 
Pipe kind, have all had the fame origin with the 
in Derby hire, viz. the great 
trata, or toad~ 
© have been fufee 
with finilar veinstull and fo are the fess af eke 
18 from {a } 
ade highly probable by Mr. Vavafor. . Phil. ‘Tranf. 
FOr. to 
reat fhrinking of the mafs,. 
a: 2 be hE 
- deferibed by 
greater part, if not all, of the natural cliffs, or facades of 
lime-ftone, in thefe diftriéts (fee Phil. Mag vol. 3r. p. 30.) 
which coatings have cemented the different beds of jione 
together, like one vaft ftone, or unftratified rock, as may be 
feen in the face of the entrance to Caftleton cave, of Mat- 
lock, High-Tor, &c. &c. and have deceived many perfons 
as to the ftructure of thefe rocks. ‘Fhe water continually 
percolating through the roofs of moft of the caverns has, 
and full is accumulating ftalaétites pendent from the roofs, 
and ftalagmites on the floor under the drippings of them: 
many of thefe have met, and formed numerous grotefque 
pillars, fupporting the roof as it were. more minute’ 
and beautiful ftalactites and ftalagmites have long fince beer 
ripped from the acceflible caverns of this diftriat to fatisfy 
Bagthaw’s, 
We have feveral grottos famous in natural hiftory ; as 
Grarrns-Litt : 2 bttl D sot 
ar Pozzuoh, four leagues 
: from Naples,. the ftreams: whereof are of a mephitical, of 
noxious quality ; whence alfo it is called bocca venenofa, the 
poifoncus mouth. See Mepuiris. 
fring up in little parcels here and there, but in one con- 
down as. 
dead, or in-a fwoon ; the limbs convulfed and trembling, till - 
ak and’ 
» OF Saffa, eight miles from the city of Braccano, in Italy 
Kircher thus :. | 
The Grotta del Serpi is big enough to hold two perfons ¢ 
ay Selecta 
‘he. it is. perforated with feveral fiftula apertures, fomewhat in 
; : * Ki Ts 5 Pee ay i 4 4 
of a fieve ; out of which, at the beginning of the 
_~ inthis cave they expofed their lepers, paralytics, arthritics,— 
and elephantiac patients, quite naked ; where hie! mth 
of the {ubterraneous ftreams refolving them into {weat, and 
