Geological Survey of Japan: Reports of Progress for 1878 and 1879

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Public Works Department, 1879 - Geology - 266 pages
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Page 63 - iron sand ; and is obtained : either by cutting down the granite and breaking it up by hand and washing it; or the river sand is washed ; or the ore is taken from alluvial ground.
Page 242 - surveys there did not happen to make it quite so clear. The north and south direction already remarked in regard to the volcanic mountains of Kiushiu would seem likely to be of the same
Page 71 - bellows and other apparatus are closely like those at Amegawa ; and my short visit was at about six o'clock in the evening of the second day of the operation. Each bellows
Page 73 - are about 20 (18 to 21) on each side of the furnace and are a little smaller than for making steel. The dzuku is drawn off in a melted state by the holes at the end of the furnace. In other respects, they say, the Bingo process does not specially differ from the Idzumo.
Page 72 - that are needed for a furnace. There is always some slag with the dzuku at the end of the operation below the level of the bottom of the furnace, the ashes and coals beneath having become somewhat depressed ; but it does not penetrate the ashes. The whole product of one operation is from 720 to 1,020
Page 68 - made in other villages into good cast iron by means of twice remelting. The blast is given by a pair of wooden bellows on each side of the furnace ; and they are like the bellows of an oil well, except that they are in two halves, end to end, with the hinges
Page 66 - with the parts below is permanent ; and at some places is not allowed to cool down for a hundred years. The furnace proper is built of wet clay in a day, and dried with a wood fire in the following night. At. three o'clock the next morning the same brands from the
Page 64 - tons of the ore of the final washing, or about one-half of one per cent, of the weight of the rock. The only vein of magnetite known is at Hatakeyama in Oomaki village, three leagues south of Amegawa; but it is only a quarter of a foot thick and is therefore quite

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