RT Journal A1 COOK JE T1 A simple stain for blood smears (tiedemann) JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1909 FD May 8 VO LII IS 19 SP 1492 OP 1493 DO 10.1001/jama.1909.25420450024002c UL http://dx.doi.org/10.1001/jama.1909.25420450024002c AB There are certain requirements which a blood stain must fulfill in order that it may be of use in the general routine work of the practitioner. It must be capable of quick and easy preparation; it should keep indefinitely; it must possess absolute simplicity in its application; and it must act quickly and reliably at all times. If, besides possessing these necessary qualifications, it may be used for other purposes—for staining pus, sputum, etc.—its value is so much enhanced. Despite the many modifications of the Jenner-Romanowsky stain which have from time to time been proposed, none which has come to my notice so admirably answers the above requirements as the one described about three years ago by Dr. E. F. Tiedmann.1 Those who have used this stain have soon discarded all others for their routine work, and I feel that its value has been so thoroughly demonstrated in the