_MUSIC._ The tune, LASST UNS ERFREUEN, one of the most famous in any hymn book, was published in _Geistliche Kirchengesäng_, Cologne, 1623. It was set to an Easter hymn beginning, “_Lasst uns erfreuen herzlich sehr_,” from whence it derives its name. The tune is unusual for its simplicity of structure and its invariable repetition of phrases throughout. Usually the alleluias in lines 3 and 6 are sung in harmony, the rest of the song in unison. The tune lends itself well to antiphonal or echo singing on the rare occasions when such varied effects are desired. The composer is not known. 12. O for a thousand tongues to sing _Charles Wesley_, 1707-88 From a poem of 18 stanzas, written by Wesley to celebrate the first anniversary of his great spiritual change, a conversion experience in which he felt the clear light of the Gospel possessing his soul. The poem was entitled, “For the Anniversary Day of One’s Conversion.” Wesley was greatly influenced by the Moravian missionary Peter Bohler who once said to him: “Had I a thousand tongues, I would praise Him with them all.” The incident, lingering in Wesley’s mind, was turned into a song which expresses the joy and confidence of the redeemed. For 150 years, and until recently, this hymn appeared as No. 1 in Methodist hymnbooks on both sides of the Atlantic. For further comments on Charles Wesley see Hymn 6. _MUSIC._ AZMON was introduced into this country from Germany where it was a favorite school song. Carl G. Gläser, the composer, was born at Weissenfels, Germany, 1784, and died at Barmen, 1829. He was a teacher of piano, violin, and voice, and director of choruses. He also owned and managed a music store. Lowell Mason, the arranger of the tune, was one of America’s earliest exponents and teachers of public school music and did much to bring worthy popular hymn tunes into the churches. He was born January 8, 1792, at Orange, N. J. At the age of 16, he was a choir leader and teacher of singing classes. At 23, he went to Savannah, Ga., as a bank clerk, returning to Boston in 1827 to become president and conductor of the Handel and Haydn Society. He wrote a large number of singable hymn tunes which have had wide use in the hymn books of all denominations. More of his compositions are found in the _Hymnary_ than of any other composer. He died at Orange, N. J., August 11, 1872. 13. Great God, the followers of Thy Son _Henry Ware, Jr._, 1794-1843 Written for an ordination service which took place in Baltimore in 1819, William E. Channing preaching the sermon.