HOT WATER SUPPLY OF THE HOT SPRINGS 



429 



earlier years may not have been accurate. In one instance, that of Alum 



Spring, there is a marked decrease in temperature In 1804 this had a 



temperature of 132°. In 1859 .... 133° .... and today it is but 114.8°.^ 



Haywood'' gives temperature measurements for forty-four 

 hot springs which range from 95.4° to 147° F. For thirty-nine 

 springs he gives two measurements each, separated by about two 

 months' time. In fourteen of these thirty-nine springs there is a 

 decrease in temperature, in eighteen there is an increase, and in 

 seven there is no change during this interval of about two months. 

 The average difference between readings is 1.5° F. The maximum 

 decrease is 6.3° F. and the maximum increase 6.4° F. With such 

 unsystematic discrepancies in the measurements of a competent 

 observer with good instruments, no conclusion can be reached as to 

 a general decrease in temperature or to the character of the probable 

 variations in temperature. 



The Hot Springs are usually considered to be the only hot springs 

 of the region. Three warm springs, however, are known from the 

 vicinity of Caddo Gap, about 50 miles west of Hot Springs. Data 

 concerning these springs collected in 191 5 by H. D. Miser are given 

 in the following table : 



SPRINGS NEAR CADDO GAP 



Name 



Location 



Geological Formation 



Temperature 



(Degrees 

 Fahrenheit) 



Springs in bed of Caddo 

 River at Caddo Gap . . . . 



North opening 



South opening 



Spring on Little Missouri 

 River 



NE. J, Sec. 19 T. 4 S., 

 R. 24 W. 



Upper part Arkan- 

 sas novaculite 



Spring on Redland Moun- 

 tain 



N. i, Sec. 17 T. 4 S., 

 R. 27 W. 



SW. \, Sec. 12, T. 5 S., 

 R. 26 W. 



Arkansas novacu- 

 Hte 



94 

 96.8 



74-3 



77.0 



' W. H. Weed, "Notes on Certain Hot Springs of the Southern United States," 

 U.S. Geol. Survey, Water-Supply Paper 145 (1905), pp. 204-5. See p. 439 of this article 

 for references to Weed's authorities. 



= 0^. cz7., pp. 30-31. , 



