CHAPTER XIX. Water 268

WATER 268

Importance; Impurities in Water; Mineral Impurities; Organic Impurities; Interpretation of a Water Analysis; Natural Purification of Water; Water in Relation to Health; Improvement of Waters; Boiling of Water; Filtration; Purification of Water by Addition of Chemicals; Ice; Rain Waters; Waters of High and Low Purity; Chemical Changes which Organic Matter of Water Undergoes; Bacterial Content of Water; Mineral Waters; Materials for Softening Water; Uses of; Economic Value of a Pure Water Supply.