AND GEOLOGICAL RELATIONS OF CERTAIN HOT SPRINGS. 
587 
Those which issue from the slate have to traverse a bed of alluvium before reaching 
the surface. 
B. Specialties of the Springs. — The following springs rise behind, that is, to the 
eastward of the town of Cauteretz, from altered slate rock through alluvium : 1. La 
Poze, carefully preserved for baths ; it is accessible only within the walls of the esta- 
blishment, but the temperature was taken at a pipe stated to be only one or two feet 
from the true source. 2. La Nouvelle Poze (not immediately employed,) issues from 
a spout in a vertical wall sustaining the alluvial soil (clay with boulders) only six or 
seven feet (as stated to me) from the source, and without any reservoir interposed. 
3. Le C6sar : we can arrive almost at the origin of this spring. My observation was 
made within the bathing-house, where it passes through a wooden tube close to the 
source. These springs are all rather copious, particularly the Cesar : they are sul- 
phureous. Some other baths exist near these, but the springs cannot be directly 
arrived at. 
The following springs occur further up the valley, beyond the Pont de la Raillikre, 
originating in granite, in the following order: 1. Source de la Railli&re, the most 
important spring of Cauteretz, and very abundant. A handsome bathing establish- 
ment has recently been built. With some difficulty I got access to the spring itself, 
and took the temperature in the very basin * in which it rises from the granite, and 
in which gas is copiously disengaged. This is in an apartment not open to the public, 
immediately behind the “ Buvette,” or cock for drinking from. The temperature I 
found 2°' 1 higher than at the buvette, this quantity of heat being lost in the inter- 
mediate space, though not many yards in extent. — 2. Le Petit St. Sauveur, so called 
from a supposed resemblance in the properties of the water to that of St. Sauveur in 
the Valley of Lavedan. On account of its low temperature it is artificially heated 
before being used. I took its temperature where it issued from a very thick wooden 
pipe, conveying it from the source, which was stated to me to be about five feet 
distant. — 3. Bain du Pre, near the last. There being an inaccessible reservoir, I did 
not take the temperature. — 4. Immediately above the last, ascending towards the 
Pont d’Espagne, is the Source du Mahourat ( mauvais trou ), which issues quite natu- 
rally from a great fissure in the granite by the side of the road. I first took the tem- 
perature at the wooden spout from which it is drunk ; but perceiving that the wooden 
conduit entered further into the rock, I obtained a light, and squeezed myself into 
the remotest part of the fissure, where I again took the temperature, which was 0 o- 5 
higher than at the other point. I was struck with the vast accumulation of gelatinous 
matter ( Baregine , Glairine, Matiere animate,) which had taken place in the conduit, 
and of which I collected a quantity. This spring, though eagerly drunk by the visi- 
tors of Cauteretz, is nearly insipid, and is stated to contain little solid matter. — 5. The 
Source des Oeufs. This spring is by no means easily reached. It issues from a 
* This basin is about 2| feet deep. 
4 f 2 
