§ Mrs. Joyce Butlerasked the Minister of Health what analysis has been made of water in areas containing a high level of calcium fluoride to determine what other chemicals or trace elements are also present which may modify the toxic effects of the fluoride.
§ Mr. K. RobinsonRoutine chemical analyses are made by water undertakers; but I am advised that a special investigation of the type suggested would be unrewarding, since no toxic effects—apart from increased dental mottling where the amounts of fluoride are excessive—have been observed as a result of fluoride in water in this country.