WATERS from ICELAND. 119 
they came fo near, and am perfeétly fatisfied that this analyfis 
is as complete and exact as it was in my power to make it, 
with that quantity of water which I got for this purpofe. 
THE proportions of the above enumerated ingredients to the 
water in which they are contained, fhew the quantities of them 
contained in an Englifh gallon of 231 cubical inches, or 58,484 
grains, which are as follows: 
| \ 
In an Englifh gallon of Rykum water: \ 
Cauftic foffil alkali, - prea 
Argillaceous earth, - - 0.29 
Siliceous earth, - - - 21.83 
Common falt, - - 16.96 
Glauber’s falt exficcated, - 7ieg 
In an Englifh gallon of Geyzer water : 
Cauftic foffil alkali, - gr. 5.56 
Argillaceous earth, - - 2.80 
Siliceous earth, Sat gba a+ 20 5O 
- Common falt, - - 14.42 
Glauber’s falt exficcated, - 8.57 
HAvING now ftated the feveral ingredients of thefe hot 
fprings, and their proportions, the principal queftions which 
remain to be confidered, are, How isthe filiceous earth difflolved 
in them, or combined with the water? Has hot water alone a 
power to diffolve this earth, or was it diffolved by the medium 
of the alkali only ? And how came the falts which we find in 
thefe waters and the fulphureous gas to be combined with 
them? As all attempts to anfwer thefe queftions muft be con- 
jectural, different opinions will be formed concerning them ; 
and 
