ON CERTAIN HOT- SPRINGS IN THE PYRENEES. 463 



ST SAUVEUR. 



There are several mineral springs at St Sauveur, but only two of importance, 

 namely, La Source des Bains, and La Hontalade. As the water of the latter is 

 nearly cold, I did not think it of importance to test the temperature accurately. 



Unfortunately, I had not the advantage of a good second thermometer at St 

 Sauveur. M. Charmasson de Puylaval, to whom I was indebted for some atten- 

 tion, showed me a broken thermometer with which he had carefully taken the 

 temperature two years previously. I believe the instrument was made by either 

 Salleron or Fastre of Paris, and appeared to have been such as that used by 

 MM. de Lalande and Broca at Cauterets. 



In company with M. de Puylaval, I visited the establishment which is sup- 

 plied with water by the Source des Bains. This spring is now isolated from the 

 rest, and has been traced for several yards into the rock, whence it is led by 

 means of a pipe into the establishment. 



I tried the temperature at the bath and douche nearest the source (according 

 to M. de Puylaval, 10 or 12 metres from the actual source). I found the tem- 

 perature to be 93 "50 Fahr. M. de Puylaval tried the temperature with a 

 common bath thermometer, and found it to be 34-50 Cent. (=94-10 Fahr.) and 

 stated that it corresponded exactly with his previous observation made with the 

 now broken thermometer. I then tested the temperature in the bath-room 

 furthest from the source (about 35 metres distant from the actual source, I was 

 informed), and found it to be 93-00 Fahr. With the bath thermometer, M. Puy- 

 laval stated it to be 3380 Cent. ( = 92 84 Fahr.), and that it corresponded with 

 his previous observations. 



Lastly, I obtained permission to enter into the excavated rock, and tried the 

 temperature at a rohinet, which I understood was within two metres of the actual 

 source, where I found the temperature to be 9400 Fahr. M. de Puylaval had 

 never taken the temperature at that point, and did not accompany me into the 

 gallery. 



The observations made by Professor Forbes upon the temperature of the 

 spring which supplies the establishment were not satisfactory. He says, — " We 

 have stated that there are reservoirs belonging to the thermal establishment of 

 St Sauveur. The consequence is, that the temperature perpetually varies. I have 

 repeatedly tried it at the ' Buvette.' Thus on the 20th of July 1835, I found it 

 to be 90-2 ; and on the 24th, only 88-8." 



The temperature observed at the RoUnet de la Douche by various observers at 

 different periods is given in the following table : — 



M. Fontan (September 1835), . 



M. Fontan (September 1837), . 



M. Gintrac (1841), .... 



Professor Filhol (1850), .... 



Dr. Scoresby- Jackson (August 1863), 



VOL. XXIII. PART III. 6 K 



Centigrade. 





FahrenTieit 



34-50 



=r 



94-10 



34-50 



= 



94-10 



34-50 



= 



94-10 



34-20 



:rz 



93-56 



34-17 



= 



93-60 



