HOT SPRINGS, ARKANSAS. 



49 



No. 18. — Hitchcock spring. 



[Situated at the base of Hot Springs Mountain. Sample for mineral analysis was taken January 9, 

 1901. Temperature on November 27, 1900, was 57.3° C, and on January 8, 1901, was 57.3° C] 



Gases (number of cubic centimeters per liter at 0° C. and 750 mm. pressure). — 

 Nitrogen, 7.94; oxygen, 2.96; carbon dioxide (free), 12.52; carbon dioxide (set free 

 from bicarbonates on evaporating to dryness), 29.46; hydrogen sulphide, none. 



Formula and name. 



Si0 2 (silica) 



S0 4 (sulphuric acid radicle) 



HC0 3 (bicarbonic acid radicle) 



XO.; (nitric acid radicle) 



N0 2 (nitrous acid radicle) 



PO4 (phosphoric acid radicle) . . 

 BO.i (metaboric acid radicle)... 



As0 4 (arsenic acid radicle) 



CI (chlorine) 



Br ( bromine) 



I (iodine) 



5? (iron and aluminum) 



Mn (manganese) 



Ca (calcium) 



Mg (magnesium) 



K ( potassium) 



Na 1 sodium) 



Li (lithium) 



XH 4 (ammonium) 



Total 



Total solids 



Albuminoid ammonia. 

 Oxygen required 



Parts per 

 million. 



Percent of 



total 



inorganic 



material in 



solution. 



44.74 



10.63 



162. 00 



1.55 



.0016 

 Trace. 



(a) 



None. 

 2.57 

 Trace. 

 Trace. 



.09 



Trace. 

 46.04 

 4.94 

 2.01 

 4.79 

 Trace. 

 .057 



279. 4186 



200. 50 

 .025 

 .55 



16.02 



3.80 



57.99 



.55 



.92 



.03 



16.48 



1.76 



.72 



1.71 



.02 



100 



Amount of 

 water used 



for each 

 determina- 

 tion. 



c. c. 



' 16, 000 



4,000 



100 



100 



100 



2, 000 



3, 500 



3, 500 



700 



8,000 



8,000 



4,000 



9,000 

 4,000 

 ■ 4, 000 

 4,000 

 4,000 

 4,000 

 500 



200 

 500 

 200 



* 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 S0 4 (sodium sulphate) 



MgS04 (magnesium sulphate) 



XaBOo (sodium metaborate) 



Ca 3 ( p6 4 ) 2 (calcium phosphate) 



NaN0 3 (sodium nitrate) 



NaX0 2 (sodium nitrite) 



Mg(HC0 3 ) 2 (magnesium bicarbonate) 



Ca(HC0 3 ) 2 (calcium bicarbonate) 



Fe( HC0 3 ) 2 (ferrous bicarbonate) 



Mn(HCG 3 )2 (manganous bicarbonate) 

 S1O2 ( silica) 



Total 



Parts per 

 million. 



0.169 

 Trace. 



3.83 



1.05 

 Trace. 

 Trace. 

 11.75 



3.37 



(•) 



Trace. 

 2.12 

 .0024 

 25.65 

 186. 46 

 .29 

 Trace. 

 44.74 



Per cent of 



total 



inorganic 



material in 



solution. 



279. 4314 



0.06 



1.37 

 .38 



4.21 

 1.21 



.76 



9.18 



66. 72 



.10 



16.01 



100 



a Small amount. 



S, Doc. 282- 



