HOT SPRINGS, ARKANSAS. 



61 



No. 30. — Arch spring. 



[Situated at the base of Hot Springs Mountain, in arch of creek under Central avenue. Sample for 

 mineral analysis taken May 19, 1901. Temperature December 15, 1900, was 53.9° C, and on January 8, 

 1901, was 51.9° C] 



Gases (number of cubic centimeters per liter at 0° C and 760 mm. pressure). — 

 Nitrogen, 8.55; oxygen, 3.52; carbon dioxide (free), 5.55; carbon dioxide (set free 

 from bicarbonates on evaporating to dryness), 30.27; hydrogen sulphide, none. 



Formula and name. 



Parts per 

 million. 



Per cent of i Amount of 

 total | water used 

 inorganic I for each 

 material in determina- 

 solution. tion. 



Si0 2 (silica) 



S0 4 (sulphuric acid radicle) . .. 

 HC0 3 (bicarbonic acid radicle) 



NO3 (nitric acid radicle) 



N0 2 (nitrous acid radicle) 



PO4 (phosphoric acid radicle) . . 

 BO-i (metabolic acid radicle) . . . 



As0 4 (arsenic acid radicle) 



CI i chlorine) 



Br (bromine) 



I (iodine) 



y; [ (iron and aluminum) 



Mn (manganese) 



Ca (calcium) 



Mg (magnesium) 



K (potassium) 



Na (sodium) 



Li (lithium) 



XH 4 (ammonium) 



Total 



Total solids 



Albuminoid ammonia 



Oxygen required 



50. 90 



7.50 



157. 50 



.44 



.0020 



Trace. 



(a) 



None. 

 2.67 

 Trace. 

 Trace. 



.12 



Trace. 

 43.00 



4.92 



1.72 



4.99 

 Trace. 

 .011 



273. 7730 



192. 50 

 .009 

 .75 



18.59 



2.74 



57. 53 



.16 



.97 



.04 



15.72 



1.80 



.63 



1.82 



100 



e.c. 



8,000 

 4,000 



100 

 ■ 100 



100 

 2,000 

 3,000 

 3,000 



600 

 5,400 

 5,400 



7,500 



7,500 

 2,000 

 2,000 

 4,000 

 4,000 

 4,000 

 500 



200 

 500 

 200 



a Small amount. 

 HYPOTHETICAL FORM OF COMBINATION. 



Formula and name. 



Parts per 

 million. 



Per cent of 



total 



inorganic 



material in 



solution. 



NH4CI (ammonium chloride) . 



LiC'l (lithium chloride) 



KC1 (potassium chloride) 



NaCl (sodium chloride) 



KBr (potassium bromide) 



KI (potassium iodide) 



NSI2SO4 (sodium sulphate) 



XaB0 2 (sodium metaborate) 



C'a 3 (P0 4 )2 (calcium phosphate) _ 



NaN0 3 (sodium nitrate) 



NaN0 2 (sodium nitrite) 



Na(HCOg) (sodium bicarbonate) 



Mg( HC0 3 ) 2 (magnesium bicarbonate) 



<"a'HC0 3 ) 2 "(calcium bicarbonate) 



Fe 1 HC0 3 ) 2 (ferrous bicarbonate) 



Mn 1 HC0 3 ) 2 (manganous bicarbonate) 

 Si0 2 (silica") 



Total 



0.033 

 Trace. 

 3.28 

 1.80 

 Trace. 

 Trace. 

 11.10 



(a) 



Trace. 

 .60 

 .0030 

 1.90 

 29.62 

 174. 16 

 .38 

 Trace. 

 50.90 



273. 7760 



0.01 



1.20 

 .65 



4.05 



.22 



.70 

 10. 82 

 63.62 



.14 



18. 59 



100 



1 Small amount. 



