(a) Short treatises for practical use:—
Sweet: On Sounds and Forms of Spoken Swedish (1½ pp. about accent), in Transactions of the Philological Society, 1877-79.
Schwartz and Noreen: Swedish Grammar: Stockholm, 1881; (4 pp. about accent, mostly practical).
(b) Scientific works—
Lythkius and Wulff: About the Rules of Sounds and Signs in the Swedish Language, and about the Accent; Lund, 1885; 460 pp. (in Swedish).
Koch: Philological Researches about Swedish Accent; Lund, 1878; 211 pp.
Paul: Grundriss der German. Philol., vol. i., abschn. 5, pp. 417, etc.: Geschichte der Nordischen Sprachen, von Noreen (gives the historical cause for, and explains the growth of the grave accent).
[28] Byrne, Principles of the Structure of Language, p. 475.
[29] Cf. Spencer, Philosophy of Style.
[30] On the sense in which the words concrete and abstract are here used, see Chap. IV., p. 45.