BURRELL : DROPPING WELL AT KNARESBOROUGH. 
141 
Ammonia .. ... 0-00002 .. 00014 
Aluminium ... trace ... trace 
Phosphoric Acid • . • trace . . . trace 
Nitrous Acid . . . none . . . none 
Nitric Acid ... none ... none 
It is impossible to state precisely how the various acids and bases 
are combined together, but there are good reasons for believing that 
the following table represents the composition of the dissolved 
mineral constituents present in the water. 
III. Dissolved Saline Constituents in grains per gallon :— 
Calcium Sulphate 114-373 
Calcium Carbonate ... ... 25 480 
Calcium Silicate ... ... -•. 1'442 
Strontium Sulphate ... ... ... 0-672 
Magnesium Sulphate ... ... .. 17-003 
Ferrous Carbonate ... ... . • 0-154 
Mauganous Carbonate ... ... 0-084 
Sodium Chloride ... ... .. 2-765 
Potassium Chloride ... ... ... 0-462 
Alumina ... ... ... -.. trace 
Phosphoric Acid ... ... ... trace 
162 435 
Fixed residue by evaporation dried at 170°- 180^ C. 162 324 
Specific Gravity at 15 o° C. ... ... 1 "0024 
IV. Gases dissolved by the water in cubic inches per gallon, 
and measured at 15-5'' C, and 760 m.m. 
Carbon Di-oxide ... 4-74 
Oxygen ... ... V29 
^■^Nitrogen ... ... 502 
Total ... .. ir05 
It may be noted that the water is very free from organic matter, 
as is often the case with hard waters. The solubility of Calcium 
Sulphate, in water at the ordinary temperature, is about 1 part in 
'Not examined for Argon. 
