The work is composed in seven numbers. After a short introduction the voices give out the theme, "Lauda Sion," followed by a chorus, "Laudis Thema," full of devotional spirit. The soprano then enunciates in the "Sit Laus plena" phrases repeated by the chorus, followed by a beautifully accompanied quartet, "In hac Mensa." The fifth number is a solemn chorale in unison, leading to a soprano solo in the arioso style, "Caro cibus," which is exquisitely beautiful. The work concludes with a very dramatic solo and chorus, "Sumit unus," set to the words "Bone pastor," and the closing verses of the hymn itself. Short as the cantata is, it is one of the most felicitous of all Mendelssohn's settings of the ritual. MOZART. Johann Chrysostomus Wolfgang Amadeus Mozart, one of the most remarkable of musical geniuses, and the only one of his contemporaries whose operas still hold the stage with unimpaired freshness, was born at Salsburg, Jan. 27, 1756. He was the son of Leopold Mozart, the Salzburgian Vice-Capellmeister, who gave him and his sister Nannerl their earliest instruction in music, and with such good results that the children travelled and gave concerts with great success. Before he was seven years of age he had composed several pieces for piano and violin, his earliest having been written at the age of five. At twelve he became court capellmeister in Salzburg. After his musical travels he went to Vienna, and there began his period of classic activity, which commenced with "Idomeneus," reached its culmination in "Don Giovanni," and closed with the "Requiem,"--the "swan-song" of his wonderful career. In his brief life Mozart composed more than fifty great works, besides hundreds of minor ones in every possible form of musical writing. His greatest compositions may be classed in the following order: "Idomeneus" (1780); "Entführung aus dem Serail" (1781); "Figaro's Hochzeit" ("The Marriage of Figaro"), (1785); "Don Giovanni" (1787); "Cosi fan Tutti," "Zauberflöte" ("The Magic Flute"), and "Titus" (1790); and the "Requiem" (1791, the year of his death). The catalogue of Mozart's works is an immense one, for his period of productivity was unusually long. From the age of five to his death there was not a year that was not crowded with his music. Besides his numerous operas, of which only the more famous are given above, he wrote a large number of symphonies (of which the "Jupiter" is now the best known), sonatas, concertos, for all kinds of instruments, even to musical-glasses, trios, quartets, quintets, and sextets for all possible combinations of instruments, marches, fugues, masses, hymns, arias of extraordinary brilliancy, liturgies, cantatas, songs and ballads, and indeed every form of music that is now known. His style was studied by Beethoven, and so closely imitated that the music of his first period, if published without autograph, would readily be attributed to Mozart.