74 





HOT SPRINGS, ARKANSAS. 



No. 43. — Reservoir sjmng. 



[Situated at base of Hot Springs Mountain, in back yard of superintendent's office. Sample for 

 mineral analysis taken May 19, 1901. Temperature on January 3, 1901, was 46.3° C, and on January 8, 

 1901, was 46.1° C] 



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

 Nitrogen, 9.14; oxygen, 3.94; carbon dioxide (free), 8.59; carbon dioxide (set free 

 from bicarbonates on evaporating to dryness), 28.92; hydrogen sulphide, none. 



Formula and name. 



SiOo (silica) 



80 4 "(sulphuric acid radicle) 



HCOo (bicarbonic acid radicle) 



N0 3 (nitric acid radicle) 



N0 2 (nitrous acid radicle) 



P0 4 (phosphoric acid radicle) . 



B0 2 (metaboric acid radicle) . . 



As0 4 (arsenic acid radicle) 



CI (chlorine) 



Br (bromine) 



I (iodine) 



Fe 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. 



43.21 



28.67 



160. 50 



.22 



.0013 



.53 



(») 



None. 



5.83 



Trace. 



Trace. 



.44 



None. 

 49.22 



4.24 



8.84 



8.33 

 Trace. 

 .008 



310. 0393 



254 



.015 



Per cent of 



total 



inorganic 



material in 



solution. 



13. 95 



9.24 



51.78 



.07 



.17 



.14 



15.87 

 1.37 

 2.85 

 2.68 



100 



Amount of 

 water used 



for each 

 determina- 

 tion. 



c. 



8, 000 



4,000 



100 



100 



100 



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) 



KBr (potassium bromide) 



KI (potassium iodide) 



K 2 S0 4 (potassium sulphate) 



Na 2 S0 4 (sodium sulphate) 



MgS0 4 (magnesium sulphate) 



NaB0 2 (sodium metaborate) 



Ca 3 (P0 4 ) 2 (calcium phosphate) 



NaN0 3 (sodium nitrate) 



NaNOo (sodium nitrite) 



Mg(HC0 3 ) 2 (magnesium bicarbonate) 



Ca(HC0 3 ) 2 " (calcium bicarbonate) 



Fe(HC0 3 ) 2 (ferrous bicarbonate) 



Mn(HC0 3 j» (manganous bicarbonate) 

 SiOo (silica") 



Total 



Parts per 

 million. 



0. 023 



Trace. 

 12. 26 



Trace. 

 Trace. 



5.37 

 25.44 

 10.67 



(•) 

 .86 

 .30 

 .0020 

 12. 58 

 198. 00 

 1.39 

 None. 

 43.21 



310. 1050 



Per cent of 



total 



inorganic 



material in 



solution. 



0.01 

 '3. _ 95 



1.73 

 8.20 

 3.44 



.28 

 .10 



4.06 



63.86 



.44 



13.93 



100. 00 



* Small amount. 



