. The chemistry of plant and animal life. Agricultural chemistry. 6o AGRICULTURAL CHEMISTRY. SAND iLUAILJiIIUULU'^ I"niiiiiiiiiiimuuumumw -RESERVOIR- the well platform, and the watering trough should not be directly over the well. The land should slope away from the well and the surfacing should be of clay. The well - should have ventilation, and should occasionally receive a cleaning. 65. Mineral Impurities.— Cal- cium carbonate, calcium sulfate, sodium chlorid, and sodium sul- fate are the most common min- erals present in water. In alkali waters the mineral impurities are sodium or pot
. The chemistry of plant and animal life. Agricultural chemistry. 6o AGRICULTURAL CHEMISTRY. SAND iLUAILJiIIUULU'^ I"niiiiiiiiiiimuuumumw -RESERVOIR- the well platform, and the watering trough should not be directly over the well. The land should slope away from the well and the surfacing should be of clay. The well - should have ventilation, and should occasionally receive a cleaning. 65. Mineral Impurities.— Cal- cium carbonate, calcium sulfate, sodium chlorid, and sodium sul- fate are the most common min- erals present in water. In alkali waters the mineral impurities are sodium or potassium compounds, often in large amounts, and there is no way of improving such waters except by distillation. Different kinds of minerals, if in excessive amounts, may impart medicinal properties; magnesium sulfate (Epsom salts) acts as a purga- tive, while calcium sulfate causes costiveness. Strong alkaline waters can generally be detected by their salty taste. An excess of some forms of alkaline salts in waters renders them unsafe for irrigation purposes, as the salts are destructive to plant life. Limestone in waters is not so serious as are other minerals. Waters sometimes con- tain limestone to such an extent that when boiled they become cloudy, which is be- cause of the removal of the carbonic acid gas which causes the limestone to remain in solution. Some waters that contain limestone are not considered in- jurious to health, although they are not so satisfactory for Fig. ss. — Charcoal water filter. ==2?^ Fig. 34. — Un- glazed porcelain Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Snyder, Harry, 1867-1927. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagricul, bookyear1913
