BORSET WATER. 
its clearness, acquires a milky hue, and deposits an 
earthy sediment, which is entirely calcareous/ At the 
same time it loses its offensive smell, and, when cold, 
has scarcely any odour. 
Wherever a large quantity of this water passes hot 
from the spring through a confined place, the upper 
covering becomes encrusted with sulphur. This is 
particularly the case with respect to the dome of the 
vault that encloses the great source which supplies the 
Emperor's bath, and which is opened, from time to time, 
for the purpose of having the sulphur brushed off. 
From the waters of Ak-la-Chapelle, though only in- 
ternally used, the body acquires a sulphureous smell ; 
and even silver worn in the pocket becomes tarnished. 
286. BORSET WATER is of two kinds. One of these 
resembles the water of Aix in every respect, except as to the 
impregnation of sulphur, which is much weaker: its tempe- 
rature is 132. The other contains no sulphur : it is, how- 
ever, equally alkaline, and the heat is as high as 15S, which 
much exceeds the hottest of the waters of Aix. 
Both these waters are used by fullers and cloth- 
workers, on account of the convenience they afford, 
without expense, of a sufficiency of hot and somewhat 
alkaline fluid which is well adapted for the cleansing of 
woollen cloth. 
In the latter of the above-mentioned springs a large 
portion of earth is suspended. This, as the water cools, 
is deposited, and forms hard incrustations of consider- 
able thickness round every substance with which it 
comes in contact. It is not, however, on this account 
found less useful for the scouring of cloth, boiling of 
vegetables for the table, or any of those domestic pur- 
poses for which soft water is required. 
In this spring there is a considerable portion of car- 
bonic acid gas, or fixed air (26), which is continually 
escaping from the fresh water, and is in sufficient quan- 
tity to corrode, in a short time, the leaden covering 
that is used for the vapour baths, and any iron within 
its reach. 
