HOT SPniKG AT BATH, 
■' Ilk 
i''* (!(,4 ^ of the hot springs of St. Michael, a suf- 
like 
of heat to boil 
■ \ Purn 
eggs, and to .sen'e for other 
I S(!''^'Poses. Among these may be instanced those 
near N*aples ; those on the summit of 
'0 the Modenese territory ; and those which 
I he 
source of the im{>erial bath at Aix la 
Japan, a hot spring is said to burst forth 
y 
^ maintains the boiling point, and the water 
P^ll'5'' flow 
it heat much longer than common water. 
*'^’w regularly, hut during an interval of two 
'■•lij'hi ; and tiie force and violence of the vapours 
s( that large stones are ejected, and raised 
ten or twelve feet, with a noise like that of 
thj! ^ piece of artillery. 
'll pflenomena which have been adduced, it 
flte exhal ations constantly escaping from the 
‘ tjeous magazines in which tliey are prepared, 
■I -’re,'*' their qualities and efiects. Some are cold 
^'1 *'■ the ^,'®^.’tjbling ah' or wind, as those near Peroul, 
t)t mountains, especially those of jEolns, 
t*V ‘'tp ■ Italy ; tis well as in particular mines, 
’’ot ''tfl'ttnmable, and of a bituminous nature, 
warm, a.s those of Wigan well. 
'*1 ^"1 the fl°t, sulphureous, and saline, more especially 
Natural stoves, su'ealing vaults, grottoes, baths, 
pill*'’ in 5 ^ ‘tear Naples, Baise, Cuma, and Puzzuoli, 
of the subterraneous works at Rome, 
as 
are of an arsenical, or other noiuous 
of the Grotta del Cane. Now, these 
\'’tC3siQ*“ ftteeting with, and mniiing tlirough water, 
ih-' 'n it a great variety of uhenomena and 
^5l>hs, 
‘l>e 
';»tha( 
by Doctor Thomson, in his history of the 
“' the HOT SPRING AT B ath has continued 
Ingher than that of the air for a period 
'iili ‘/ttb *■"'0 thousand years, although it is so far 
^ y Volcano, tliat, witliout a very violent and 
of the agency of volcanic fires, it 
V '.I- fti' I'here are' various decom- 
bodies, which generate coasiderablo 
suhij. nrore properly, water is itself tlie de- 
■ generating heat by its decomposition. 
i 
