§ Mr. Viantasked the Minister of Health what pilot investigations have been made to show the fluorine content of the urine of adults in the general population, and also in the general populations selected for the experiments concerned with fluoridation of water supplies, in accordance with the recommendation of the British Mission that visited the United States of America.
§ Mr. Iain MacleodA few adults were included in the pilot study to which I referred in my answer on 14th February but, as explained in that answer, extensive surveys of the fluoride content of urine have been shown to be unnecessary by 207W recent work in the United States of America, with which the results of our pilot study agreed.