pella_ (but there is reason to believe that these, except
_Komm Jesu komm_, were intended to be partly supported by the organ). A
sixth motet has an obligato figured-bass accompaniment.

A few early choruses, mostly turned to account in later works.

A large collection of plain chorales, including several original melodies.

II.--SECULAR VOCAL MUSIC

_Der Streit zwischen Phoebus und Pan_ and _Der zufrieden gestellte Aeolus_;
both entitled _Dramma per Musica_, but showing no more essential connexion
with the stage than Handel's _Acis and Galatea_.

7 solo and 7 choral cantatas, of which latter three were almost entirely
absorbed into the Christmas oratorio and the B minor mass. Of the solo
cantatas two are Italian (one of these being Bach's only developed work for
voice and clavier) and two are burlesque.

Several tunes with clavier bass, almost foreshadowing the modern song.

III.--INSTRUMENTAL MUSIC

A. _Orchestral_

7 clavier concertos arranged from violin concertos and other sources.

3 concertos for two claviers (two being arranged from concertos for two
violins).

2 concertos for three claviers.

The 6 Brandenburg concertos, for various combinations.

2 violin concertos, and a colossal _torso_ of a concerted violin-movement
forming the prelude to a lost church cantata.

1 concerto for two violins.

4 orchestral suites. (The symphony in F in the same volume of the _B. G._
is only an earlier version of the first Brandenburg concerto.)

B. _Chamber Music_

3 sonatas for clavier and flute; a suite and 6 sonatas for clavier and
violin, 3 for clavier and viola da gamba; 2 trios with figured bass; 2
flute-sonatas and a violin suite with figured bass; 6 sonatas (_i.e._ 3
sonatas and 3 partitas) for violin alone; 6 suites for violoncello alone.

C. _Clavier and Organ Music_

Bach's own collections are:--

1. _Das wohltemperirte Klavier_ for clavichord: two books each containing
24 preludes and fugues, one in each major and minor key; with the object of
stimulating tuning by "equal temperament" instead of sacrificing the
euphony of remoter keys to that of the more usual ones.

2. _Klavier-Uebung_ (chiefly for harpsichord) in four books comprising:
(i.) 15 two-part inventions and 15 three-part symphonies, (ii.) 6 partitas,
(iii.) The "Goldberg" variations. 4 duets, and an important collection of
organ choral-preludes, with the "St Anne" prelude and fugue in E flat,
(iv.) The Italian concerto and Frenc