§ Mr. Lubbockasked the Secretary of State for Education and Science if he will state the rate of dental caries among five-year-old schoolchildren for each of the local education authorities included in the sample survey last autumn; and what statistical inferences he draws from these figures on the effectiveness of natural and artificial fluoridation of water supplies as a means of inhibiting decay.
§ Mr. HoggThe following is the answer:
per cent. Manchester … 82.6 Middlesex … 75.9 Northumberland … 86.4 Nottinghamshire … 74.6 Somerset … 80.8 Yorkshire, West Riding … 84.5 East Sussex … 70.7 I draw no statistical inferences on fluoridation from these figures because in none of these areas does the public water supply contain a significant amount of fluoride.