72 



HOT SPRINGS, ARKANSAS. 



No. 41. — Mud spring. 



[Situated at base of Hot Springs Mountain, under free bath house. Sample for mineral analysis 

 taken May 19, 1901. Temperature on December 29, 1900, was 46.8° C, and on January 8, 1901, was 

 48.3° C] 



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

 Nitrogen, 9.14; oxygen, 3.44; carbon dioxide (free), 10.84; 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) 



HC0 3 (bicarbonic acid radicle) 



NO3 (nitric acid radicle) 



NOo (nitrous acid radicle) 



P0 4 (phosphoric acid radicle).. 

 B0 2 (metaboric acid radicle) . . . 



As6 4 (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



Vj > (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. 



52. 30 



11. 95 

 168. 10 

 .44 

 .0016 



Trace. 



(a) 



None. 

 3.17 

 Trace. 

 Trace. 



.29 



Trace. 

 46.89 

 5.22 

 2.23 

 6.49 

 Trace. 

 .018 



297. 0996 



216. 00 

 .011 

 .40 



Per cent of 

 total 



inorganic 

 material in 



solution. 



17.60 



4.02 



56.58 



.15 



1.07 



.10 



15.78 



1.76 



.75 



2.18 



.01 



100 



Amount of 

 water used 

 for each 

 determina- 

 tion. 



c. c. 



8,000 



4,000 



100 



100 



ICO 



2, 000 



3,000 



3,000 



600 



5, 400 



5,400 



9,000 



9,000 

 2,000 

 2,000 

 4,000 

 4,000 

 4,000 

 500 



100 

 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) 



MgS0 4 (magnesium sulphate) 



NaBOo (sodium metaborate) 



Ca 3 (P0 4 ) 2 (calcium phosphate) 



NaNO.j (sodium nitrate) 



NaNOo (sodium nitrite) 



Mg(HC0 3 ) 2 (magnesium bicarbonate) 



Ca(HCO.i)-2 (calcium bicarbonate) 



Mn(HC0 3 ) 2 (manganous bicarbonate) 



ALO f ( {erric oxi de and alumina) 



Ca~Si0 3 (calcium silicate) 



SiOo (silica) 



Total 



Parts per 

 million. 



0.053 

 Trace. 

 4.25 

 1.83 

 Trace. 

 Trace. 

 17.30 

 .33 



(») 



Trace. 

 .60 



.0024 

 31.00 

 188. 89 

 Trace. 



.42 



.73 

 51.92 



297. 3254 



Per cent of 

 total 



inorganic 

 material in 



solution. 



0.02 



1.43 

 .62 



5.81 

 .11 



.20 



10.43 

 63.53 



.14 



.25 

 17.46 



100 



a Small amount. 



