§ Dr. Strossasked the Minister of Health, as representing the Lord President of the Council, what estimate has been made of the bone content of radioactive strontium at which an appreciable increase in bone cancer in the general population is to be expected.
§ Mr. VosperI am advised that, in the light of present knowledge, the best estimate that can be made is that the incidence of bone cancer in the general population is likely to be inappreciable if the level of strontium 90 in human bone is below 100 units. Observations in this country show that the present level is on the average less than one unit.