This is an announcement for the paper "Algebraic characterizations of measure algebras" by Thomas Jech. Abstract: We present necessary and sufficient conditions for the existence of a countably additive measure on a complete Boolean algebra. Archive classification: Functional Analysis; Logic Mathematics Subject Classification: 28 The source file(s), Measure.tex: 31579 bytes, is(are) stored in gzipped form as 0612598.gz with size 9kb. The corresponding postcript file has gzipped size 89kb. Submitted from: jech@math.cas.cz The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/math.FA/0612598 or http://arXiv.org/abs/math.FA/0612598 or by email in unzipped form by transmitting an empty message with subject line uget 0612598 or in gzipped form by using subject line get 0612598 to: math@arXiv.org.