Fouridation

Fouridation In 1931 at the University of Arizona Agricultural Experiment clutch M. C. Smith, E. M. Lantz, and H. V. Smith discovered that when given drinking water supplied with nuclear number 9, rats would ramp up tooth defects. Further interrogatory by H. T. Dean and E. Elove of the United States normal Health Service confirm this report, and stated that what is known as mottled tooth. Mottled tooth is a condition in which washrag spots develop on the back teeth. Gradually the purity spots go through with(predicate) darker and darker until the tooth is eroded completely. This was believed to be caused by atomic number 9 in drinking water (Behrman pg.

181). A strong hangover was heard when this was released and people wanted all fluorine immobilise of their water. But later tests concluded that communities with high levels of fluorine in their drinking water suffered less dental cavities. Further examination concluded that at least 1.0 parts per million of fluorine could help to prevent cavities, but more tha...If you want to ache a full essay, order it on our website: OrderEssay.net

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