The Use ok Hard or Saline Waters for Sheep Dipping. 41 



The samples were analysed by Mr. E. V. Flack, the analyses resulting 

 as follows : — 



In grains per gallon — 



Biesjesvlakte. iioodeklipheu vel. 



Total solids at 105° C 526.12 510.16 



Total solids at 180° C 492.52 486.64 



Silica ... 1.53 3.85 



Oxide of iron and alumina ... .77 .42 



Lime 25.69 59.92 



Magnesia 33.69 14.31 



Alkalies calculated as XaJ»... 189.62 166.62 



Sulphuric oxide 29.52 9.33 



Chlorine 279.28 282.07 



Carbon dioxide 2.83 1.14 



In parts jjer 100,000— 



Temporary hardness 9.20 3.70 



The proportions of salts contained in solutioii may. therefore, be 

 assumed to be the following, in g-rains per gallon : — 



Biesjesvlakte. Roodeklipbeuvel. 



Calcium carbonate 6.43 2.59 



Calcium sulphate 50.18 15.86 



Calcium chloride 2.82 102.95 



Magnesium chloride 80.62 34.00 



Sodium chloride 357.83 314.44 



Mixing tests made in the laboratory showed that these waters 

 refused to mix with carbolic dips, but that sodium arsenite dissolved 

 in them quite easily. Difficulty was experienced in obtaining a good 

 solution of sodium arsenite in sea-water, and, after standing, a 

 precipitate occurred showing that sea-water is unsuitable foi' mixing 

 with sodium arsenite dips. 



In 1913 three samples of water weie obtained fioni Ihe following- 

 sources in the Calvinia Division : — 



1. Sous Puts. 



2. Yerdwaal Vlei Puts. 



3. Bitterputs East Puts. 



The following were the analytical results, stated in grains per 

 gallon : — 



1. 2. 3. 



Total solids at 105° C 388.4 464.0 734.8 



Total solids at 180° C 374.6 445.0 709.2 



Silica 2.64 2.60 3.24 



Oxide of iron and alumina ... .56 .32 1.60 



Lime 28.48 38.48 67.00 



Magnesia 26.96 49.54 77.41 



Alkalies calculated as Na,0 109.10 94.78 150.66 



Carbon dioxide — 5.98 14.48 



Sulphuric oxide 87.50 173.07 203.02 



Chlorine 132.95 82.01 191.35 



Sulphuretted hydrogen — 2.25 — 



Free sulphuric acid 2.35 — -^ 



