46 



HUT SPRINGS, ARKANSAS. 



No. 15. — Big Iron spring. 



[Situated at the base of Hot Springs Mountain and empties into a reservoir. Sample for mineral 

 analysis was taken January 9, 1901. Temperature was 63.9° C. on November 24, 1900, and 63.9° C. on 

 January 7, 1901.] 



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

 Nitrogen, 8.80; oxygen, 3.79; carbon dioxide (free), 6.92; carbon dioxide (set free 

 from bicarbonates on evaporating to dryness), 30.02; hydrogen sulphide, none. 



Formula and name. 



Parts per 

 million. 



Si0 2 (silica) 



S0 4 "( sulphuric acid radicle) . . . 

 HC0 3 (bicarbonic acid radicle) 



NO s (nitric acid radicle) 



N0 2 (nitrous acid radicle) 



P0 4 (phosphoric acid radicle) . 

 B0 2 (metaboric acid radicle) . . 



As0 4 (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



Fl (fluorine) 



\^> (iron and aluminum) 



Mn (manganese) 



Ba (barium) 



Sr (strontium) 



Ca (calcium) 



Mg (magnesium) 



K (potassium) 



Na (sodium) 



Li (lithium) 



NHj (ammonium) 



Total 



Total solids 



Albuminoid ammonia 



Oxygen required 



45.59 



7.84 



168. 10 



.44 



.0016 



.05 



1.29 



None. 



2.53 



Trace. 



Trace. 



None. 



.19 



.34 

 Trace. 

 Trace. 

 46.93 

 5.10 

 1.60 

 4.76 

 Trace. 



.040 



Per cent of 



total 



inorganic 



material in 



solution. 



284. 8016 



198.50 

 .035 

 .55 



16.00 



2.75 



59.02 



.16 



.02 

 .45 



.07 

 .12 



16.48 



1.79 



.56 



1.67 



"'.'62' 



100 



Amount of 

 water used 



for each 

 determina- 

 tion. 



c c. 

 ' 16, 000 



4,000 



100 



100 



100 



8,000 



6,750 



5,000 



700 



8,000 



8,000 



15,000 



8,000 



4,000 

 15, 000 

 6,000 

 4,000 

 4,000 

 4,000 

 4,000 

 4,000 

 500 



200 

 500 

 200 



HYPOTHETICAL FORM OF COMBINATION. 



Formula and name. 



NH 4 C1 (ammonium chloride) 



LiCl (lithium chloride) 



KC1 (potassium chloride) 



NaCl (sodium chloride) 



KBr (potassium bromide) 



KI (potassium iodide) 



NaoS0 4 (sodium sulphate) 



MgS0 4 (magnesium sulphate) 



SrS0 4 (strontium sulphate) 



BaS0 4 (barium sulphate) 



NaB0 2 (sodium metaborate) 



Ca 3 (P0 4 ) 2 (calcium phosphate) 



NaNO B (sodium nitrate) 



NaNOo (sodium nitrite 1 



Mg(HC0 3 )o (magnesium bicarbonate) . 



Ca(HC03) 3 "(calcium bicarbonate) 



Mn(HC0 3 ) 2 (manganous bicarbonate) . 



^v 3 |(ferric oxide and alumina) 



Si6 2 "(silica) 



Total. 



Parts per 

 million. 



0.119 

 Trace. 

 3.05 

 1.65 

 Trace. 

 Trace. 

 10.06 

 1.30 

 Trace. 

 Trace. 

 1.98 



.08 



.60 



. 0024 

 29.14 

 189. 95 

 1.09 



45. 59 



Per cent of 

 total 



inorganic 

 material in 



solution. 



284. 8814 



0.04 



1.07 

 .58 



3.54 

 .46 



.60 



.03 



99 



10.23 

 66.68 



.38 



.09 

 10. 01 



100 





