1. form of simple screening test. Many have emphasized the consistent way in which, as was seen in our own subjects, the osmotic resistance is increased even in mild types of thalassaemia;e.g; Valentine; Neel,1944
2. We therefore compared the results for mean corpuscular fragility which we had obtained with those in 30 patients with iron-deficiency;anaemia; Callender, S.T.; Mallet, B.J.; Lehmann, H.;Brit. J,1961
3. Cassells, D. A. K. (1938). J. Path. Bact., 47, 603.
4. Practical Haematology;Dacie, J.V.,1956
5. The Haemolytic Anaemias, Congenital and Acquired;Churchill,