17 ([return])
[ This was the Society of Musical Science, founded at Leipzig in 1738 by Mag. Lor. Mitzler; s. Mitzler's Musik Bibl., III., p. 346; Musik. Almanach, 1782, p. 184. In his Violin Method, p. 7, L. Mozart praises this Society, and hopes that it will direct its scientific researches to questions of practical interest in music]

18 ([return])
[ A long series of letters to his friendly publisher J. J. Lotter, at Augsburg, written during 1755 and 1756, when his work was in the press, testify to L. Mozart's care for accuracy of expression, orthography, and printing.]

19 ([return])
[ Ph. Era. Bach advises clavier-players to hear as much good singing as possible; "it gives the habit of thinking in song, and it is well always to sing a new idea aloud to oneself, so as to catch the right delivery" (Versuch über die wahre Art das Klavier zu spielen, I., p. 90).]

20 ([return])
[ "Wherein consists good execution?" says Ph. Em. Bach (Versuch über die wahre Art das Klavier zu spielen, I., p. 86). "In the power of expressing musical ideas to the ear correctly and with full effect, whether singing or playing.">[

21 ([return])
[ Marpurg's Hist. krit. Beitr., III., p. 160.]