134 dn ACCOUNT of 
or preflure promoting an adhefion of the particles, or by fome 
infinuation of matter (perhaps filiceous) into the pores of the 
mafs. 
THERE is another fountain in the valley not much inferior 
in beauty to that which I have defcribed. It breaks out from 
under one of the mounds clofe to the river. Its eruptions are, 
I think, in fome refpects, more beautiful than thofe of the for- 
mer. They rife nearly to the fame height, and the quantity of 
water thrown up at one time is greater, and not fo much {cat- 
tered into fpray. The jets continue feldom longer than a mi- 
nute, and the intervals between them are from five to fix mi- 
nutes. They are forced to bend forwards from the well, by 
the fhelving of the bank, or probably their height would be 
very confiderable ; for they appear to be thrown up with great 
force. We never dared approach near enough to look deep into 
the well; but we could perceive the water boiling near its fur- 
face, from time to time, with much violence. The ground in 
front of it, was covered with a white incruftation, of a more 
beautiful appearance than the depofition near any other {pring 
in this place. By atrial of it with acids, it feemed almoft 
entirely calcareous. 
I HAVE now defcribed to you the two moft remarkable foun- 
tains in the valley of Rykum, the only two which throw up 
water to a confiderable height with any regularity. There are 
fome from whence, in the courfe of every hour or half hour, 
beautiful jets burft out unexpectedly ; but their eruptions con- 
tinue only a few feconds, and between them the water boils in 
the fame manner as in the other bafons. 
Towarps the upper end of the valley, there. was a very cu- 
rious hole, which attracted much of our attention. It feemed 
to have ferved at fome former period as the well of a fountain. 
It was of an irregular form, and from four to five feet in dia- 
meter. It was divided into different hollows or cavities at the 
depth of a few feet, into which we could not fee a great way, 
on 
