oo^ 



KEPOET UNITED STATES GEOLOGICAL SURVEY. 



the Andes that the thermal springs of the Appalachian region of the 

 United States do to the geysers of the Yellowstone and the hot springs 

 of Kevada and California. The analogy can be carried still further, as 

 the table-lauds of the Amazon, like the Mississippi Valley, are destitute 

 of thermal springs. In the Argentine Eepublic the springs are found 

 near the Andes in the west. Mendoza, which is the center of the region, 

 is frequently subject to earthquakes, and in 1861 12,000 out of 15,000 

 people were destroyed there by an earthquake. 



BATHS OF CHILLAN, IN CHILI. 



The most noted springs in Chili are those of Chilian, on the Nevada 

 Chilian, near the volcano of Autuco. They are near the region of per- 

 petual snow, and accessible only in summer. The highest temperature 

 recorded by Lieutenant Gillis, from whose description these notes are 

 taken,* is 190° F. The springs, according to him, are mostly sulphu- 

 reted, the escape of sulphureted hydrogen being very great, and the 

 water, after standing, depositing sulphur, although very clear at first. 

 A great many of the springs are in constant ebullition, and the rocks 

 are so hot that the stream in passing over them is converted into steam 

 with a hissing noise, while under foot is a roar as from gigantic steam- 

 boilers. A cold spring is found in the midst of the hot ones. 



In the following catalogue there is considerable discrepancy as to 

 completeness in the various countries, but as far as the writer is aware 

 it is the only attempt yet made to bring together in one list the springs 

 of the regions indicated. There may be some duplications, but as far 

 as possible they have been eliminated. The list for Bolivia is especially 

 deficient, but all have been included of which records could be obtained. 



Talle of thermal springs of Mexico, Central America, West Indies, and South America. 

 [For the list of authorities for spring localities, &c., see Bibliographical Appendix E.] 



Locality. 



Country. 



Highesttem- 

 perature. 



Ojo Caliente, near Carrizal 



Ojo Caliente, northeast of Saltillo 



Agua Caliente, east side of the sierra del Balcalele 



Aguas Calientes, about 80 miles west of San Luis Potosi. .. 



Chichimequillo, near Guanaxuato 



Agua Caliente, between Tepuopes and Piedras Verdes 



■Near Aguas Buenas, at the foot of Mount Cubilete . . . . 



!N"ear volcano ot Jorulla 



On volcano of San Andres _. 



Mud volcanoes and springs near Jaripeo 



Kear Istapan 



Kear Lake Jalisco 



Penon de los Baiios, Tescuco Lake 



Atliaoa, 7 miles below Miiador 



Amatlan 



On Pacific plains, between Chivela and Tarifa Passes, Te- . 

 huanlepec. 



La Chivela Pass, Tehuantepec 



South and west slopes of Cerro Prieto, Tehuantepec 



Lake Amatitlan, Guatemala 



San Andres, Guatemala 



San Bartolome aguas calientes, Guatemala 



On river Siguile, near Sunil, Guatemala 



Agua Caliente, Honduras 



Warm Springs of Almolonga, San Salvador 



Aguas Calientes, San Salvador 



In Ahuacapan, San Salvador 



Near Volcano of San Vincente, San Salvador 



Mexico 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



.......do 



°F. 



200 



"ioe' 



Hot. 

 Boiling. 



Hot. 

 Hot. 



80 



do 



do 



Central America . 

 do 



Hot. 



-do 

 .do 

 -do 

 -do 

 -do 

 .do 

 .do 



Tepid. 



Warm. 



Hot. 

 Hot. 



* United States Astronomical Expedition to Sotitli America, 1840-52, by Lieut. J. M. 

 Gillis. Vol. II. 



