11. Their main product will be salt used for de-icing roads, human consumption, water softening and agriculture. 12. Before running for office, Blair worked in her parents'apple orchard and for their water softening company. 13. That is, they bind tightly to di-and trivalent metal ions, which is useful in water softening . 14. The most common case is water softening consisting of removal of mercury, arsenic and many others. 15. "' Water softening "'is the removal of calcium, magnesium, and certain other metal cations in hard water. 16. Wherever water hardness is a concern, water softening is commonly used to reduce hard water's adverse effects. 17. At this stage the turntable and ash pit were still evident as was the 1939 water softening plant. 18. These systems do not fall within the term " water softening " but rather " water conditioning ". 19. In 1898 a water softening plant was installed, the first of its kind on the Great Central Railway. 20. "' Ion exchange "'has long been used as a water softening process, although usually on a single-home basis.
