THE MEDICINAL SPRINGS OF SOUTH AFRICA. 22^ 



100,000 c.c. of water therefore contain 0.0336 gram of NH3, 

 corresponding to 0.03559 gram NH^. 



Magnesium. 



1 litre of water gives 0.0332 gram of ]\Ig.P._.07. 



100,000 c.c. of water therefore contain 0.7253 gram of 

 magnesium. 



Sodium. 



2 Htres of water of 12.95° were evaporated to dryness and 



left, after removal of silicia, iron, aluminium, calcium 

 and magnesium, 3.5350 grams NaCl. 

 100,000 c.c. of water of 4° therefore contains 69.580 grams 

 of sodium. 



Tal!le of Ion Equivalents. 



Cations. Anions. 



69.58 116.33 



Na X I = 3025 CI. X I = 3.281 



23 3546 



8.5375 2.8204 



€a X 2 = 0.426 HCO.; X I = 0.046 



40.09 61.008 



0.7253 0.3807 



Mg X 2 = 0.060 SO^ X 2 = 0.008 



24.32 96.07 



0.1 177 

 Ba X 2 = 0.002 



137-37 



0.03559 



NH4 X I == 0.002 



18.042 



0-1793 



Al X 3 = 0.020 



27.1 



0.04 



Fe • X 3 = 0.002 



55-85 



3-537 3-335 



