In 1929, the music of the psalter was revised by the Church of Scotland to bring its harmonies into line with those in the revision of the hymnal. The psalter was usually printed at the front of the first two editions of the hymnal (1898, 1927), and throughout much of the 20th century there was a widespread tradition of beginning worship with a psalm before continuing in the hymn books. However, the most widely used version of the third edition did not have the psalter in the same volume, with the result that the full psalter has disappeared from the majority of Church of Scotland congregations.