306 Headden — Group of Radium-hearing Springs. 



Analysis of Alum Spring. 

 Cations. 



Per liter. 



Na 0-4561 0*019786 



K 0-0216 0-000551 



Ca 0-4089 0-010198 



Mg 0-1888 0*007750 



Fe 0-1485 0-001860 



Al _ 0-3036 0-011203 



Sum r 1-5275 



Anions. 



Ci _. 0-2790 0-007869 



S0 4 3-5275 0-036608 



SiO„._. 0-0745 0*000975 



Monivalent ions. 

 0*019786 

 0-000551 

 0-020396 

 0-015500 

 0-003720 

 0-033609 



3-9810 



0-093562 



0-007869 

 0-073216 

 0-001950 



0-083035 



Sum of cations 0-093562 



Sum of anions _ 0*083035 



Excess of cations . . 



0-010527 



The excess of cations, 0*010527, expressed as monivalent 

 ions correspond to 0*005264 bivalent C0 3 ions or 0*2316 gram 

 C0 2 per liter as neutral carbonates. Specific gravity at 15*5° C. 

 1*00546. Total solids 5*7401. 



If the calcium were removed from this water in the form of 

 gypsum it would give rise to just such a mixture as we 

 actually found. 



The sample which remained milky was not analyzed, but it 

 was thoroughly shaken and a portion of it filtered, and the 

 white precipitate examined ; it consisted principally of aluminic 

 hydrate. 



As the point at which I had formerly found the white, pasty 

 mass, an analysis of which has already been given, was buried 

 under a mass of debris, I of course failed to obtain more of 

 it, but I found at this place masses of the mineral alunogen. 

 This mineral occurs abundantly at the base of the conglomerate 

 previously mentioned, and the specimens found at this time 

 may have come from this source. 



The most interesting feature of these springs is the sinter 

 bed which they have formed, of which there is probably more 

 than a million cubic feet remaining at this time. An analysis 

 of a general sample taken from the face next to the river gave 

 the following results : 



