The empire of Russia covers nearly an eighth of the land surface of the globe. Her northern limit is the Arctic Ocean, and the regions of eternal ice and snow; on the south, she rests upon the Black Sea, in a region of almost tropical warmth. Tropical fruits grow in her Crimean possessions, while polar bears and reindeer wander over the frozen and barren lands of her extreme north. She has every variety of climate, and every variety of soil. Here are long ranges of lofty mountains enclosing countless treasures of wealth in their rocky bosoms; beyond them you find wide stretches of treeless steppes, fertile as our western prairies, and boundless, apparently, as the sea. Wide and deep rivers wind through her territory, and facilitate the communications which commerce demands; broad lakes spread their shiny surfaces at frequent intervals, and reflect the primeval forests that line their shores. In a word, Russia is a little world in herself. The races of men included in her inhabitants are as varied as her climate; it is said that more than a hundred distinct and different languages are spoken by the subjects of His Imperial Majesty, the Autocrat of all the Russians. With such a vast territory, and such a variety of mountain and plain, hill and valley, within her borders, Russia may be expected to hold a prominent place as a land of mines. Such an expectation would be well founded, as the land of the Czar is in the very front rank of mining countries. The intelligence and enterprise of Peter the Great led to the development of her mining interests, and the work thus begun has been steadily followed to the present day. Probably the best mining school in the world is at St. Petersburg. It has constantly nearly three hundred pupils, all supported at the expense of the government. The establishment is the geological mirror of the entire empire. The mountains of Lapland and the Caucasus, Finland and the Valdai, the vast Ourals, the Altai range and the peaks of Nerchinsk and the Baikal, Siberia and Kamchatka, in fact every part of Russia, have been drawn upon to fill its museum. Not only have they contributed, but they steadily continue to do so, year after year, as fast as new discoveries are made; and the government spares no pains or expense to make the collection the most perfect in the world. [Sidenote: THE PRODUCE IN RUSSIA.]