Abstract
The Feulgen technic as modified by Heitz promises to become an extremely useful tool in the solution of certain cytological problems. A procedure is outlined for using this technic with root tip smears, and smears of plant microspores. The chief improvement suggested over previous methods is that the material be mounted in euparal, after immersion in 95% alcohol. The technic is of value in the study of chromosome fragmentation, chromatid coiling, centromeres, etc., in both somatic tissue and in microspores.