Lyons
and Paris, 1885-1887); C. von Hahn, _Aus dem Kaukasus_ (Leipzig,
1892), _Kaukasische Reisen und Studien_ (Leipzig, 1896), and _Bilder
aus dem Kaukasus_ (Leipzig 1900); V. Sella and D. Vallino, _Nel
Caucaso Centrale_ (Turin, 1890); K. Koch, _Der Kaukasus_ (Berlin,
1882); C. Phillipps Woolley, _Savage Svanetia_ (2 vols., London,
1883); E. Levier, _A travers le Caucase_ (Paris, ed. 1905), especially
valuable for botany; G. Merzbacher, _Aus den Hochregionen des
Kaukasus_ (2 vols., Leipzig, 1901); A. Fischer, _Zwei Kaukasische
Expeditionen_ (Berne, 1891); E. Fournier, _Description geologique du
Caucase central_ (Marseilles, 1896); G. Radde, _Reisen an der
persisch-russischen Grenze. Talysch und seine Bewohner_ (Leipzig,
1886), _Die Fauna und Flora des sudwestlichen Kaspigebiets_ (Leipzig,
1886), _Karabagh_ (Gotha, 1890), and _Aus den daghestanischen
Hochalpen_ (Gotha, 1887); and Count J. Zichy, _Voyages au Caucase_ (2
vols., Budapest, 1897). F. Loewinson-Lessing has an account of the
geology of the district along the military road from Vladikavkaz to
Tiflis in the _Guide des Excursions du VII^e Congres geol. internat_.
(St Petersburg, 1897). N.Y. Dinnik writes on the fauna in _Bull. Soc.
Imperiale des Naturalistes de Moscou_ (1901); J. Mourier on the
folk-tales in _Contes et legendes du Caucase_ (1888); and on modern
history G. Baumgarten, _Sechzig Jahre des kaukasischen Krieges_
(Leipzig, 1861). But a very great amount of most valuable information
about the Caucasus is preserved in articles in encyclopaedias and
scientific periodicals, especially the _Izvestia_ and _Zapiski_ of the
Russian and Caucasian geographical societies, in P.P. Semenov's
_Geographical Dictionary_ (in Russian, 5 vols., St Petersburg,
1863-1884), and in the _Russkiy encyklopedicheskiy slovar_ (1894), and
in the _Kavkazskiy kalendar_ (annually at Tiflis). See also G. Radde
and E. Koenig, "Der Nordfuss des Daghestan und das vorlagernde
Tiefland bis zur Kuma" (Erganzungsheft No. 117 to _Petermanns
Mitteilungen_), and "Das Ostufer des Pontus und seine kulturelle
Entwickelung im Verlaufe der letzten 30 Jahre" (Erganzungsheft No. 112
of the same); by V. Dingelstedt in _Scot. Geog. Mag_.--"Geography of
the Caucasus" (July 1889); "The Caucasian Highlands" (June 1895); "The
Hydrography of the Caucasus" (June 1899); "The Riviera of Russia"
(June 1904), "The Small Trades of the Caucasus"