A simple procedure for screening compounds for leukotoxic action is described. Results obtained on assaying known leukopenic agents such as urethan, nitrogen mustard, x-ray, potassium arsenite, and benzene indicate a reasonable measure of reliability.

ACKNOWLEDGMENT The authors wish to express grateful appreciation to Mr. Ben May of Mobile, Alabama, for support of this project.

© 1948 by American Society of Hematology, Inc.
1948
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