HOT SPRINGS, ARKANSAS. 



69 



No. 38. — Horse Shoe spring. 



[Situated at base of Hot Springs Mountain, under Horse Shoe bath house. Sample for mineral 

 analysis taken May 19, 1901. Temperature on December 27, 1900, was 58.8° C, and on January 8, 

 1901, was 59.8° C] 



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

 Nitrogen, 9.54; oxygen, 2.46; carbon dioxide (free), 10.02; carbon dioxide (set free 

 from bicarbonates on evaporating to dryness), 30.84; hydrogen sulphide, none. 



Formula and name. 



SiO. : (silica) 



S0 4 (sulphuric acid radicle) . . . 

 HC0 3 (bicarbonic acid radicle 



N0 3 (nitric acid radicle) 



NO* (nitrous acid radicle) 



PO4 (phosphoric acid radicle) . 

 BOo (metaboric acid radicle.). 



AsOj (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



~y {• (iron and aluminum) 



Mn (manganese) 



Ca (calcium) 



Mg (magnesium) 



K (potassium) 



Na (sodium) 



Li (lithium) 



NH 4 (ammonium) 



Total 



Total solids 



Albuminoid ammonia. 



Oxygen required 



Parts per 

 millions. 



49.81 

 7.86 

 171. 10 

 Trace. 

 .0005 

 Trace. 



(a) 



None. 

 2.50 

 Trace. 

 Trace. 



.26 



.27 

 46.61 

 5.07 

 1.60 

 5.42 

 Trace. 

 .030 



290.5305 



202 



.003 

 .30 



Per cent of 



total 



inorganic 



material in 



solution. 



17. 14 

 2.71 



58.89 



.86 



.09 



.09 



16. 05 



1.74 



.55 



1.87 



.01 



100 



Amount of 

 water used 



for each 

 determina- 

 tion. 



8, 000 



4,000 



100 



100 



100 



2,000 



3,000 



3,000 



600 



5,400 



5,400 



9,000 



9,000 

 2,000 

 2,000 

 4,000 

 4,000 

 4,000 

 500 



100 

 500 

 200 



a Small amount. 

 HYPOTHETICAL FORM OF COMBINATION. 



Formula and name. 



NH4CI (ammonium chloride) 



LiCl (lithium chloride) 



KC1 (potassium chloride) 



NaCl (sodium chloride) 



KBr (potassium bromide) 



KI (potassium iodide) 



Na 2 S04 (sodium sulphate) 



NaB0 2 (sodium metaborate) 



Ca 3 (P04) s (calcium phosphate) 



NaN0 3 (sodium nitrate) 



NaNOo (sodium nitrite) 



Xa(HC0 3 ) (sodium bicarbonate) 



MgiHC6 3 ) 2 (magnesium bicarbonate) 



Ca(HC0 3 ) 2 ~(calcium bicarbonate) 



Fe(HC0 3 ) 2 (ferrous bicarbonate) 



Mm HC0 3 )2 (manganous bicarbonate) 



AL761 (^ erric oxide and alumina) 



SiOo (silica) 



Total 



Parts per 

 million. 



0.090 



Trace. 



3.05 



1.63 



Trace. 



Trace. 



11.63 



(a) 



Trace. 

 Trace. 



.0008 

 3.68 

 30.52 

 188. 77 



.32 



.87 



.23 



49.81 



290. 6008 



Per cent of 



total 



inorganic 



material in 



solution. 



0.03 



1.05 

 .56 



4.00 



1.27 



10.50 



64.96 



.11 



.•30 



.08 



17.14 



100 



» Small amount. 



