[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 _Melanges 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. [639] "The Girl and the Dogs, an Eskimo Folk-tale," _Amer. Anthropologist_, June 1898, p. 181 sq. [640] _Through the Gold Fields of Alaska to Bering Strait_, 1898. [641] Cf. W. Bogoras, _The Chukchee, Memoir of the Jesup North Pacific Expedition_, Vol. VII. 1904-10 [642] This, however, applies only to the fishing Koryaks, for G. Kennan speaks highly of the domestic virtues, hospitality, and other good qualities of the nomad groups (_Tent Life in Siberia_, 1871). [643] See L. Sternberg, _The Tribes of the Amur River, Memoirs of the Jesup North Pacific Expedition_, Vol. IV. 1900. [644] _Mem. Imp. Soc. Nat. Sc._ XX. Supplement, Moscow, 1877. [645] "Scheinen grosse Aenlichkeit in Sprache, Gesichtsbildung und Sitten mit den Aino zu haben" (_Ueber die Aino_, Berlin, 1881, p. 12). [646] _Through Siberia_, 1882, II. p. 227. [647] _Ibid._ p. 235. [648] _Ibid._ p. 221. [649] _L'Anthropologie_, VI. No. 3. [650] _Bul. du Museum d'Hist. Nat._ 1896, No. 4. All the skulls were brachy or sub-brachy, varying from 81 to 83.8 and 84.8. The author remarks generally that "photographes et cranes different, du tout au tout, des choses similaires venues jusqu'a present de Mongolie et de Chine, et font plutot penser au Japon, a Formose, et d'une maniere plus generale a ce vaste ensemble de peuples maritimes que Lesson designait jadis sous le nom de 'Mongols-pelasgiens,'" p. 3.