HOT SPRINGS, ARKANSAS. 



45 



No. 14. — Red spring. 



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

 1901. Temperature was 60.9° C, November 23, 1900, and 62.8° 0., January 8,' 1901. 



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

 Nitrogen, 7.90; oxygen, 2.81; carbon dioxide (free), 15.32; carbon dioxide (set free 

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



Formula and name. 



Si0 2 (silica) 



S0 4 (sulphuric acid radicle) . . . 

 HCO3 (hicarbonic acid radicle) 



N0 3 (nitric acid radicle) 



NOa (nitrous acid radicle) 



PO4 (phosphoric acid radicle) . 

 BO* (metaboric acid radicle) . . 



As6 4 (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



. ?}■ (iron and aluminum) 



Mn (manganese) 



Ca (calcium) 



Mg (magnesium) 



K (potassium) 



Xa (sodium) 



Li (lithium) 



Xh 4 (ammonium) 



Total 



Total solids 



Albuminoid ammonia 



Oxygen required 



Parts per 

 million. 



45.17 

 7.95 

 166. 50 

 Trace. 

 .0033 

 Trace. 



( a ) 



None. 



2.36 



Trace. 



Trace. 



.11 



.27 

 46.21 

 4.84 

 1.57 

 4.98 

 Trace. 



.048 



280. 0113 



Per cent of 

 total 



inorganic 

 material in 



solution. 



198. 00 

 .010 



.175 



16.12 



2.84 



59.44 



.84 



.04 



.10 



16.50 



1.76 



.56 

 1.78 



.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 



4,000 

 4,000 

 4,000 

 4,000 

 4,000 

 4,000 

 500 



200 

 500 

 200 



a Small amount. 

 HYPOTHETICAL FORM OF COMBINATION. 



Formula and name. 



NH4CI (ammonium chloride) 



LiCl (lithium chloride) 



KC1 (potassium chloride) 



XaCl (sodium chloride) 



KBr (potassium bromide) 



KI (potassium iodide) 



Xa.iS0 4 (sodium sulphate) 



XaBO* (sodium metaborate) 



Ca ;' P0 4 )* (calcium phosphate) 



XaX0 3 (sodium nitrate) 



NaN0 2 (sodium nitrite) 



Na 1 HCO3) (sodium bicarbonate) 



Mgi HCO :; ) 2 (magnesium bicarbonate) 

 ( la 1 HC0 3 ) 2 Tcalcium bicarbonate) 



A.1 0- J ( ' Ferric oxide and alumina) . . . 



Mh s 4 (mangano-manganic oxide) ... 



CaSiOg (calcium silicate) _ 



SiO* (silica) 



Total 



Parts per 

 million. 



0.143 

 Trace. 

 2.99 

 1.39 



Trace. 

 Trace. 

 11.76 



(a) 



Trace. 



Trace. 



.005 



2.26 



29.14 



186. 65 



.15 



.38 

 .35 



44.99 



280. 208 



Per cent of 

 total 



inorganic 

 material in 



solution. 



0.05 



1.07 

 .50 



4.20 



.81 



10.40 

 66. 58 



.05 



.14 

 .13 



16.07 



100 



a Small amount. 



