[629] De l'Harmonie des Voyelles dans les Langues Uralo-Altaïques, 1874, p. 67 sq.
[630] General Principles of the Structure of Language, 1885, Vol. I. p. 357. The evidence here chiefly relied upon is that afforded by the Yakutic, a pure Turki idiom, which is spoken in the region of extremest heat and cold (Middle and Lower Lena basin), and in which the principle of progressive assonance attains its greatest development.
[631] Explained and illustrated by General Krahmer in Globus, 1896, p. 208 sq.
[632] H. Lansdell, Through Siberia, 1882, I. p. 299.
[633] "Ueber die Sprache der Jukagiren," in Mélanges Asiatiques, 1859, III. p. 595 sq.
[634] W. I. Jochelson recently discovered two independent Yukaghir dialects. "Essay on the Grammar of the Yukaghir Language," Annals N. Y. Ac. Sc. 1905; The Yukaghir and the Yukaghirized Tungus. Memoir of the Jesup North Pacific Expedition, Vol. IX. 1910. For the Koryak see his monograph in the same series, Vol. VI. 1905-8.
[635] Ten Months among the Tents of the Tuski.
[636] "Ueber die Koriaken u. ihnen nahe verwandten Tchouktchen," in Bul. Acad. Sc., St Petersburg, XII. p. 99.
[637] Peschel, Races of Man, p. 391, who says the Chukchi are "as closely related to the Itelmes in speech as are Spaniards to Portuguese."
[638] Petermann's Mitt. Vol. 25, 1879, p. 138.