PEALF,.] CHANGES OF TEMPEEATUEE IN THEEMAL SPEINGS. 



385 



In the following tables tlie observations upon a number of springs are 

 compared : 



Steamboat Spring, on Bear Biver, at Soda Simngs, Idalio Territory. 



Year of observation. 



Observer. 



Tempera- 

 ture of 

 spring. 



Tempera- 

 ture of 

 the air. 



1843 





87 

 85i* 

 87|ancl88 



°F. 

 "28J 



1871 





1877 



Peale 



80 and 79 









*The thermometer used was a very ordinary one, and the low temperature may be due to its in- 

 correctness, as the readings in 1877 were more than 2 degrees higher. 



La Beine, at Bagneres-de-Luchon, in France. 



Year of observation. 



Name of observer. 



Temperature 

 of spring. 



1761 





l''4 2 



1818 





119 7 



1):32 





12'^ 8 



1833 



do°. 



1"'2 8 



1835 



110 6 





*Fi]hol 



131 









* This observation is taken from Walton, p. 355, and the date is not given. The rest of the table is 

 from Forbes's Philosophical Transactions, 1836, Part II, p. 571. 



Tanibour, or Le Ch'and Bain, at Barnes, France. 



Year of observation. 



!N"ame of observer. 



Temperature 

 of spring. 



1739 





°F. 

 Ill 25 



1750 





111 112 



1S26 





111 4 



1835 





111 9 









This table and the following one are from Forbes (Philosophical Trans- 

 actions, 1836, Part II, p. 571) : 



Locality. 



Spring. 



Carrere, 

 1754. 



Auglade, 

 1819. 







OR. 

 18 

 19.4 

 30.3 

 3.5.2 

 35.2 

 43 



45.5 

 49 

 C0(167°F.) 



OR. 

 18 5 







18.8 

 30.3 

 35 2 



Molitz 













34 



Vemct 



vSource Ext6rienr 



42 8 







44 5 



Aries 



Escaldadon Gros 



49 





Olette 



60 









At Chaudes-aigues, according to Le Coq,the spring of Par in 1771 had 

 a temperature of 107° F., and in 1828 it was 177^° F., seeming to have 

 become hotter. The effects of earthquakes and active volcanic action 

 upon the temperatures of hot springs have already been considered. 

 Changes are frequently noted in regions that are actively volcanic. 

 25 H, PT II 



