Unity in immensity is Russia’s chief characteristic. From the huge wall of the Caucasus to the Baltic this empire, in itself greater than all the rest of Europe, in its numerous provinces presents perhaps less variety of climate than west European countries whose area is ten or twelve times less. This is on account of the flat uniformity. And yet, underlying this homogeneity of climate and configuration, nature has marked with special characteristics and a distinct individuality a number of regions which, divided into two groups, embrace all European Russia. Equally flat, with a climate nearly equally extreme, these two great zones, notwithstanding their similarity, present a remarkable contrast in soil, vegetation, moisture, and most other physical and economic conditions. One is the forest region, the other the woodless zone of the steppes; they divide the empire into almost equal halves. From the opposition, from the natural dualism of the steppe and the forest, has sprung the historical antagonism and the now-ended strife between the two halves of Russia--the struggle between the sedentary north and the nomad south; between the Russian and the Tatar; between the Muscovite state laid in the forest region, and the free Cossacks, children of the steppes. The forest region, though ceaselessly diminished by cutting, still remains the more extensive. Occupying the entire north and centre, it grows wider from east to west, from Kazan to Kiev. Beyond the polar circle no tree can withstand the intensity and permanence of the frost. On both sides of the Ural, in the neighbourhood of Siberia, stretch vast boggy plains (_toundras_), perpetually frost-bound, and clothed with moss. In these latitudes no cultivation is possible, no pasturage but lichens is to be obtained, no animal but the reindeer can exist. Hunting and fishing are the sole occupations of the few inhabitants who make their dwelling in these lands of ice. The soil of the wooded plains, at least in the northwest, from the White Sea to the Niemen and the Dnieper, is low, swampy, and peaty, intersected by arid sandy hills. The Valdai Hills, the highest plateau, scarcely attain the height of one thousand feet. This region is rich in springs and is the source of all the great rivers. The flatness of the land prevents the rivers from assuming a distinctly marked course, and as no ridge intervenes, their waters at the thaw run together and form enormous swamps; or, travelling slowly down undefined slopes, form at the bottom vast lakes like the Ladoga, a veritable inland sea, or strings of wretched little pools, like the eleven hundred lakes in the government of Archangel.