6: John Ruskin, from the ninth lecture of "Val d'Arno."

7: John Ruskin. Third lecture of "Val d'Arno."

8: Franz Liszt's "Life of Chopin," Chapter V.

9: _Ibid_, Chapter VI.


10: "On Sound."

11: "On Sound" is referred to. The last paragraph of Section 10,
Chapter II, may interest the children. The last two paragraphs of
Section 13 are not only interesting, but they show how simply a
scientist can write.

12: If the original is desired, see Tyndall's "Glaciers of the Alps."

13: Schumann wrote in a letter to Ferdinand Hiller, "We should learn
to refine the inner ear."

14: From the sermon entitled "The Seriousness of Life."

15: Notice sometime how many of our English words have the Latin
_con_.

16: See the fourth chapter of Reuben Post Halleck's "Psychology and
Psychic Culture."

17: For instance, the subject of the C minor Fugue in the first book