In May and June of 1948 a survey of hemoglobin values was carried out on 842 girls and 827 boys, ages 7 tO 14 inclusive, in Saskatoon public schools, who represented about a third of this population group in the city.

Values for girls ranged from 10.0 to 16.3 Gm. per 100 ml. of blood, with an average of 13.5. The corresponding values for boys were 11.2. tO 16.7, and 13.7. The average for the whole group was 13.6, which is among the highest even reported for children of these ages. The average values for children in the different age groups were slightly higher than those reported for comparable groups in other parts of Canada.

Values for boys and girls of the same age were similar. There was an increase from near 13 in the 7 year old group to near 14 in the 14 year old group. The similarity in hemoglobin values for both boys and girls of these ages, and the small increase from 7 tO 14 years of age, are in agreement with observations of other workers.

Eleven per cent of the children had been subject to more than the usual degree of illness. No significant differences appear when the above figures are corrected by removing this group.

ACKNOWLEDGEMENTS We are greatly indebted to Dr. Griffith Binning for his help and cooperation, without which this survey could not have been carried out. His interest and advice, not only during the course of the work, but in the preparation of this paper, were very much appreciated, and we should like to render him our sincere thanks. To the principals and staffs of the schools included in the survey we extend thanks for their courtesy and help. Dr. H. B. Collier, Head of the Department of Biochemistry, rendered valuable help and advice during the course of the survey, and in the preparation of this paper. We wish to acknowledge this with our thanks. Helpful suggestions were received from Dr. L. B. Jaques, Professor of Physiology at the University of Saskatchewan, and from Dr. E. W. McHenry, Professor of Public Health Nutrition at the University of Toronto. We extend to them our thanks.