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428 feet per minute at the periphery. The form of apparatus mostly used is that of an inverted frustum of a cone. The general principle of its operation is that of a wooden cylinder revolving in a wooden mantle or mantle of wire-work, between which the rice has to circulate and be rubbed. Sometimes the rice, as it passes into the polisher, is subjected to an infusion of indigo toned down with rice-flour to a pale blue. This gives the rice a bluish tint, that is liked better in England than the natural creamy whiteness of the grain itself. On leaving the polishers, the grain is blown or aspirated, and separated into whole rice, broken rice, and rice of different sizes. A recent "improvement" is to pass the grain through an oiling-machine so as to give it a smoother and glossier surface.

The Volcanic Eruption in New Zealand.—The recent volcanic eruption which laid waste a large tract of country in New Zealand was one of the most remarkable that has taken place in civilized lands since the eruption of Mount Vesuvius in a.d.79. It also presented many features in common with the Vesuvian eruption. Like that, it took place from a volcano which had never been known to exhibit activity since man had lived in the region; like it, it was distinguished by immense emissions of ashes and the burial of towns; and as the Vesuvian eruption numbered among its victims the naturalist Pliny, so in this one the young Englishman Brainard was overtaken while interested in observing the phenomena. The district afflicted by the eruption was becoming a favorite resort for tourists from all parts of the world on account of the remarkable phenomena and the beautiful aspects of scenery it presented, which in some respects resembled those of our Yellowstone wonderland. It is called the "Hot Lakes" district, and is situated about forty miles inland from the Bay of Plenty, on the east coast of the island. The lakes Rotorua and Rotomahana occupied its central portion, and were divided by fifteen or sixteen miles of "hot-spring country," in which numerous small columns of steam rise from bubbling pools of hot water. The ground around these springs is of the most treacherous character, is frequently broken up by the bursting out of new springs, and has been known to swallow up human beings passing over it. Nine miles from Rotomahana Lake rose Mount Tarawera, a curious truncated mountain two thousand feet high, whose summit was regarded by the natives with a peculiar veneration, and two adjacent peaks. On the borders of the lake were the "pink and white terraces," curved formations of sinter, of the color named, rising stairwise for about one hundred and fifty feet in height, with clear water running over them or standing in pools on their flats, the constant depositions from which added to their growth. The volcanic disturbances began on the night of the 9th of June, with a frightful earthquake-shock, followed by the burst of a glaring, pillar-shaped light from the top of Mount Tarawera, while over it hung a great black cloud. The scene was accompanied, according to the accounts, with loud reports, heavy shocks, tongues of flame, and the shooting of fire-balls. Then came a shower of ashes, mud, and stones over the township which buried the village of Wairoa under a deposit of from ten to twenty feet in thickness. About a hundred lives were lost, among them those of a part of the family of Mr.Haszard, the schoolmaster. The "pink and white terraces" were blown into the air, and the lake on whose borders they stood was ingulfed. Mud cones, vomiting forth steam and stones and mud, occupy their place. The aspect of the mountains was changed, and a large fissure was opened east of Mount Tarawera. As seen from New Plymouth, one hundred and fifty miles distant, the column of ashes rising into the air appeared to be about twenty-two thousand feet high. The noise of the explosion was heard at Christchurch, three hundred miles away; and vessels sailing one hundred and thirty miles away found the air thick with fine dust which settled on their decks. A hurricane arose about an hour after the explosion, blowing toward the scene of volcanic activity, and then in a few hours suddenly ceased, when ashes fell. The weather also became very cold. It is said that, about a fortnight before this disaster occurred, a wave three feet high suddenly arose on Lake Tarawera, at the foot of the mountain, and washed the boats out of the boat-houses.