40 



HOT SPRINGS, ARKANSAS. 



No. 9. — Rector spring. 



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

 9, 1901. Temperature on November 17, 1900, was 61.1° ('., and on January 8, 1901, was 62.4° C] 



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

 Nitrogen, 7.58; oxygen, 3.02; carbon dioxide (free), 12.82; carbon dioxide (set free 

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



Formula and name. 



Si0 2 (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) ... 



As0 4 (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine). 



Fel 



\]\{ iron and aluminum) 



Mn (maganese). 



Ca (calcium) 



Mg (magnesium) . 



K (potassium) 



Na (sodium) 



Li (lithium) 



NH 4 (ammonium) . 



Total 



Parts per 

 million. 



44.91 



7.60 



166. 50 



.09 



.0013 

 Trace. 

 (») 



None. 

 2.50 

 Trace. 

 Trace. 



.21 



.11 

 46.18 

 4.97 

 1.68 

 4.64 

 Trace. 



.062 



Per cent of Amount of 

 total ! water used 

 inorganic | for each 

 material in determina- 

 solution. tion. 



279. 4533 



Total solids 



Albuminoid ammonia. 

 Oxygen required 



203 



.035 

 .65 



10.07 



2.72 



59. 58 



.03 



.90 



.04 



16.53 



1.77 



.60 



1.66 



.02 



100 



c.c. 



8,000 



4,000 



100 



100 



100 



2,000 



3,000 



3,000 



800 



3,200 



3,200 



2,000 



2, 000 

 2,000 

 2,000 

 4,000 

 4,000 

 4,000 

 500 



200 

 500 

 200 



1 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) 



NaB0 2 (sodium metaborate) 



Ca 3 (P0 4 )o (calcium phosphate) 



NaN0 3 (sodium nitrate) 



NaN0 2 ( sodium nitrite) 



Na(HC0 3 ) (sodium bicarbonate) 



Mg(HC0 3 ) 2 (magnesium bicarbonate) 

 Ca(HC0 3 ) 2 (calcium bicarbonate) 



A? O l (^ errlc oxide and alumina) . . . 

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



CaSi0 3 (calcium silicate) 



Si0 2 (silica) 



Total 



Parts per 

 million. 



0.184 



Trace. 

 3.20 

 1.42 



Trace. 



Trace. 



11.25 



( a ) 



Trace. 

 .12 

 .002 

 1.57 



29.92 



186. 45 



.30 



.15 



.41 



44.70 



279. 676 



Per cent of 



total 



inorganic 



material in 



solution. 



0.07 



1.15 

 .51 



4.02 



.04 



.56 

 10. 70 



66.67 



.11 



.05 



.14 



15. 98 



100 



a Small amount. 



