Water in Relation to Health and Disease. 
729 
At Woodall Spa, in Lincolnshire, a water said to possess 
valuable medicinal properties yields no less than 1542’2 grains 
of saline matter per gallon, as follows — 
Grains per 
gallon 
Chloride of sodium (common salt) .... 133(H) 
Chloride of calcium 1 J 1 0 
Chloride of magnesium . . . . • • Dl ‘2 
Carbonate of soda 10'0 
Total . . 1542'2 
This sample is remarkable, not only on account of the large 
total amount of inorganic matter, but also for the quantity ot 
chloride of sodium, or common salt, it contains. 
The next sample is drawn from wells in the Chalk at 
CroydoD, and is noteworthy for the large amount of carbonate 
of lime it contains — 
Silica .... 
Grains per 
gallon 
. 1-2 
Carbonate of lime 
. 17-8 
Carbonate of magnesia 
. 1-4 
Chloride of sodium 
. 20 
Sulphate of soda . 
. 0 0 
Total 
. 
This is a very hard water. 
The sample which gave the following analysis is from 
Sudbrook Springs, under the Severn : — 
Grains per 
gallon 
Carbonate of lime ....... 13 - 0 
Carbonate of magnesia ...... 5 - 4 
Sulphate of magnesia ....... 3‘2 
Nitrate of magnesia 0-6 
Chloride of magnesium ...... 0 8 
Chloride of sodium (with a little potash) . . . 3 5 
Total . . 27T 
Besides a considerable amount of chalk, this water is 
noticeable for the number and variety of the salts of magnesia it 
contains. It is therefore classed with the magnesian waters. 
Water collected on gathering grounds where the geological 
formation is other than the igneous rocks is sometimes only 
slightly charged with mineral matter, to the extent, for example, 
of 4 or 5 grains per gallon, as is shown by the following 
analyses of the Woodland water supplied to Manchester, and the 
Holmfirth water in Yorkshire ; — • 
