70 



HOT SPRINGS, ARKANSAS. 



No. 39. — Army and Navy spring. 



[Situated on side of Hot Springs Mountain. Sample for mineral analysis taken Mav 19, 1901. Tem- 

 perature on December 28, 1900, was 61.4° C, and January 8, 1901, was 61.4° C] 



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

 Nitrogen, 9.70; oxygeu, 2.37; carbon dioxide (free), 17; carbon dioxide (set free 

 from bicarbonates on evaporating to dryness), 30.58; hydrogen sulphide, none. 



Formula and name. 



SiOj (silica) 



S0 4 (sulphuric acid radicle)... 

 HCO3 (bicarbonic acid radicle) 



N0 3 (nitric acid radicle) 



N0 2 (nitrous acid radicle) 



PO4 (phosphoric acid radicle) . 

 B0 2 (metaboric acid radicle).. 



AsOj (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



K ? - (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 

 million. 



50.51 



9.41 



169. 60 



1.33 



.0030 



Trace. 



C) 



None. 

 3.33 

 Trace. 

 Trace. 



.28 



.14 

 47.11 

 5.14 

 1.93 

 5.98 

 Trace. 



.111 



294. 8740 



210 



.070 

 .40 



Per cent of 



total 



inorganic 



material in 



solution. 



17.12 

 3.19 



57.52 

 .45 



1.13 



.10 



.05 



15.98 



1.74 



.65 



2.03 



.04 



100 



Amount of 

 water used 

 for each 

 determina- 

 tion. 



c. c. 



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. 



Parts per 

 million. 



Per cent of 



total 



inorganic 



material in 



solution. 



NH4CI (ammonium chloride) 



LiCl (lithium chloride) 



KC1 (potassium chloride) 



NaCl (sodium chloride) 



KBr (potassium bromide) 



KI (potassium iodide) 



NaoS04 (sodium sulphate) 



NaBO.i (sodium metaborate) 



Ca 3 (P0 4 ) 2 (calcium phosphate; 



NaNO-j (sodium nitrate) '. 



NaN0 2 (sodium nitrite) 



Na(HC0 3 ) (sodium bicarbonate) 



Mg(HC0 3 ) 2 (magnesium bicarbonate) 

 Ca(HC0 3 ) 2 (calcium bicarbonate) 



AlO ( (^ err i c oxide and alumina) . . . 

 Mn 3 6 4 (mangano-manganic oxide)... 



CaSi0 3 (calcium silicate) 



Si0 2 (silica) 



Total 



0.330 

 Trace. 



3.68 



2.24 

 Trace. 

 Trace. 

 13.93 



(a) 



Trace. 



1.82 



.0045 



.33 



30.95 



190. 62 



.40 



.19 



.12 



50.45 



295. 0645 



0.11 



1.25 

 .76 



4.72 



.61 



.11 

 10.49 

 64.61 



.14 



.06 



.04 



17.10 



100 



"Small amount. 





