1. A simple method of representing erythrocyte fragility as a distribution curve of actual cellular fragility is described.

2. The importance of deciding the form of a distribution before using summarizing statistics is emphasized.

3. The danger of concluding that abnormal fragility is present in the presence of increased marrow activity is pointed out.

4. Possible applications in diagnosis are suggested.

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© 1949 by American Society of Hematology, Inc.
1949
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