LIST OF WORKS.
Of all the great composers, Mozart was one of the most prolific. The chronological thematic catalogue of his works, by Kochel, published at Leipzig in 1862, contains 626 numbers, varying in length from short pieces of only a few bars to operas, the manuscripts of which fill hundreds of pages. Even a clearer idea of the enormous quantity of music written by Mozart in his short life of thirty-six years will be gained when it is said that the complete collection of his works, published by Breitkopf and Hartel, of Leipzig, fills nearly 13,000 folio pages. The following list, compiled from Kochel's catalogue, will show not only the extent, but the variety of the ground covered by the composer. A few of the works mentioned by Kochel have been lost, and are therefore not included in Breitkopf's edition.
1. VOCAL MUSIC.
1. Nineteen Masses, and the Requiem. Of the Masses three are incomplete, and the genuineness of one is doubtful.
2. Four Litanies and three Vespers.
3. Forty short pieces of sacred music (offertories, motetts, etc.).
4. Two oratorios (La Betulia Liberata and Davide Penitente) and four cantatas.
5. Twenty-three operas and other dramatic works. This list includes the incidental music to the play König Thamos, and the two unfinished operas, L'Oca del Cairo and Lo Sposo Deluso.
6. Sixty-six concert arias, trios, etc., with orchestral accompaniment. Many of these were written by Mozart for his personal friends; others were intended to be introduced, according to the custom of the time, into operas by other composers.