52 



HUT SPRINGS, ARKANSAS. 



No. 21. — Alum spring. 



[Situated at the base of Hot Springs Mountain at side of Central avenue. Sample for mineral analy- 

 sis was taken January 9, 1901 . Temperature on December 4, 1900, was 43. 3° C, and on January 8,1901, 

 was 46° CI 



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

 Nitrogen, 9.57; oxj^gen, 3.55; carbon dioxide (free), 13.08; carbon dioxide (set free 

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



Formula and name. 



Si0 2 (silica) 



S0 4 (sulphuric acid radicle) . . . 

 HC0 3 (bicarbonic acid radicle) 



N0 3 (nitric acid radicle) 



N0 2 (nitrous acid radicle) 



PO4 (phosphoric acid radicle) . 

 B0 2 (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) 



Na (sodium) 



Li (lithium) 



NHj (ammonium) 



Total 



Total solids 



Albuminoid ammonia 



Oxygen required 



Parts per 

 million. 



45. 56 

 7.95 

 166. 50 

 Trace. 

 .0013 

 Trace. 

 (.) 



None. 



2.57 



Trace. 



Trace. 



.09 



.11 

 45.97 

 4.84 

 1.65 

 5.59" 

 Trace. 



.069 



Per cent of 



total 



inorganic 



material in 



solution. 



280. 9003 



201. 00 

 .014 

 .70 



16.22 



2.83 



59.27 



.92 



.03 



.04 



16.37 



1.72 



.59 

 1.99 



.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) 



NaCl (sodium chloride) 



KBr (potassium bromide) 



KI (potassium iodide) 



Na._>S0 4 (sodium sulphate) 



NaBOo (sodium metaborate) 



Ca 3 (P0 4 ) 2 (calcium phosphate) 



XaN0 3 (sodium nitrate) 



NaN0 2 (sodium nitrite) , 



Na (HC0 3 ) (sodium bicarbonate) 



Mg(HC0 3 )» (magnesium bicarbonate) 

 Ca(HC0 3 )o (calcium bicarbonate) 



]yo [(ferric oxide and alumina) 



Mn.064 (mangano-mangauic oxide)... 



CaSi0 3 (calcium silicate) 



Si0 2 (silica) 



Total 



Parts per 

 million. 



0.205 



Trace. 

 3.15 

 1.53 



Trace. 



Trace. 



11.77 



( a ) 



Trace. 



Trace. 



.002 



4.27 



29.14 



184. 71 



.13 



.15 



1.05 



45. 02 



Per cent of 



total 



inorganic 



material in 



solution. 



281.127 



0.07 



1.12 

 .55 



4.18 



1.52 

 10.37 

 65.70 



.05 



.05 

 .37 



16.00 



100 



a Small amount. 





