66 



HOT SPRINGS, ARKANSAS. 

 No. 35. — Ed Hardin spring. 



[Situated at base of Hot Springs Mountain. Sample for mineral analysis taken May 19, 1901. 

 perature on January 8, 1901, was 43° C] 



Tem- 



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

 Nitrogen, 9.97; oxygen, 2.76; carbon dioxide (free), 14.20; 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 (bicarbonic acid radicle) 



K0 3 (nitric acid radicle) 



NOo (nitrous acid radicle) 



P0 4 (phosphoric acid radicle). 

 BOo (metaboric acid radicle).. 



As6 4 (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



Fel 



.1 > (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. 



46.57 



7.49 



165. 00 



1.33 



.0013 

 Trace. 



( a ) 



None. 



2.50 



Trace. 



Trace. 



.19 



.20 

 46. 32 

 4.79 

 1.70 

 4.65 

 Trace. 



.023 



Per cent of 



total 



inorganic 



material in 



solution. 



280. 7643 



202 



.010 

 .25 



16.58 



2.67 



58.77 



.47 



.89 



.07 



.07 



16.49 



1.71 



.61 

 1.66 



.01 



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 



7,500 



7, 500 

 2, 000 

 2,000 

 4,000 

 4,000 

 4,000 

 500 



200 

 500 

 200 



* Small amount. 

 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) 



Na.,S0 4 (sodium sulphate) 



MgS0 4 (magnesium sulphate) 



NaBOo (sodium metaborate) 



Ca 3 (P0 4 ) 2 (calcium phosphate) 



NaN0 3 (sodium nitrate) 



NaNOo (sodium nitrite) 



Mg(HC0 3 )o (magnesium bicarbonate) 

 Ca(HC0 3 ) 2 "(calcium bicarbonate) 



A? O I (f err ' c oxide and alumina) . . . 

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



CaSi0 3 (calcium silicate) 



SiOo (silica) 



Total 



Parts per 

 million. 



0.068 

 Trace. 

 3.24 

 1.50 

 Trace. 

 Trace. 

 11.01 

 .06 

 ( a ) 



Trace. 

 1.82 

 .0019 

 28. 78 

 187.23 



.27 



.28 

 .26 



46.44 



280. 9599 



Per cent of 



total 



inorganic 



material in 



solution. 



0.02 



1.15 

 .53 



3.92 

 .02 



.65 



10. 24 

 66.65 



.10 



.10 



.09 



16.53 



100 



"Small amount. 



