The correction of mean cell volume and mean cell haemoglobin concentration.

more accurate than the red cell count (7-10% minimum error). In this respect, we may confirm the reproducibility of the haematocrit determination since duplicates, set up in 3 mm. Wintrobe tubes and spun simultaneously in the same centrifuge, agree within less than 0.5 divisions, read to the nearest tenth of a division by microscopic magnification against an eyepiece scale. However, while techniques for haemoglobin estimation and red cell counting are standardized, those for the haematocrit determination are less