48 



HUT SPKINGS, AKKANSAS. 



No. 17. — Arsenic spring {north). 



[Situated at the base of Hot Springs Mountain, just back of Arlington Hotel. Sample for mineral 

 analysis was taken January 9, 1901. Temperature on November 28, 1900, was 55.4° C, and on January 

 8, 1901, was 56.4° C] 



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

 Nitrogen, 7.82; oxygen, 3.21; carbon dioxide (free), 10.84; carbon dioxide (set free 

 from bicarbonates on evaporating to dryness), 29.46; hydrogen sulphide, none. 



Formula and name. 



SiOo (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) . . . 



As0 4 (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



Fe, 



Al/ 1 



Mn (manganese) .. 



Ca (calcium) 



Mg (magnesium).. 



K (potassium) 



Na (sodium) 



Li (lithium) 



NH 4 (ammonium) . 



(iron and aluminum). 



Total 



Total solids ,. 



Albuminoid ammonia. 

 Oxygen required 



Parts per 

 million. 



45.67 

 8.58 

 163. 50 

 .44. 

 .0020 

 Trace. 



( a ) 



None. 



2.36 

 Trace. 

 Trace. 



.09 



Trace. 

 45.40 

 4.70 

 1.88 

 5.12 

 Trace. 

 .037 



Per cent of 



total 



inorganic 



material in 



solution. 



277. 7790 



16.46 



3.08 



58.88 



.15 



.81 



.03 



16.36 



1.69 



.69 



1.84 



.01 



100 



Amount of 

 water used 



for each 

 determina- 

 tion. 



194. 00 

 .012 

 .35 



c. c. 



'10,000 



4,000 



100 



100 



100 



2,000 



3,500 



3,500 



700 



8,000 



8,000 



4,000 



9,000 

 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 (PO) 2 (calcium phosphate) 



NaNOv (sodium nitrate) 



NaNOo (sodium nitrite) 



Na(HCO.j) (sodium bicarbonate) 



Mg(HC0 2 ) (magnesium bicarbonate) . 



Ca(HC0 2 ~) (calcium bicarbonate) 



Fe(HCOo) (ferrous bicarbonate) 



Mn(HCO s ) 2 (manganous bicarbonate). 

 Si0 2 (silica) 



Total. 



Parts per 

 million. 



0.110 

 Trace. 



3.58 



.97 



Trace. 



Trace. 



12. 70 



( a ) 



Trace. 

 .60 

 .003 

 1.68 



28. 30 



183. 87 



.29 



Trace. 



45.67 



277. 773 



Per cent of 



total 



inorganic 



material in 



solution. 



0.04 



1.29 

 .35 



4.57 



.22 



.60 

 10.19 

 66.19 



.11 



16.44 



100 



1 Small amount. 



