. Transactions. Fig. 5.—Koeeax Copper SmexteeShowing Blower in Position. Fig. 6.—Kiver Valley ^earSak Fig. 7.—Diminutive GoldStamp Mill. iui. 8.—Korean Panxixo CoNCENTR.\TES. A TRIP THROUGH NORTHERN KOREA. 609 The Korean furnaces are small and of rude construction andconsist briefly of a wall or back about 10 ft. high, againstwhich is built an oven about 3 ft. in diameter. The structuralmaterial is stone and mud. The oven is filled with ore andcharcoal and covered over with mud or clay, there being nochimney for the smoke and gases, which force their way outthrough apertures due to imperf
. Transactions. Fig. 5.—Koeeax Copper SmexteeShowing Blower in Position. Fig. 6.—Kiver Valley ^earSak Fig. 7.—Diminutive GoldStamp Mill. iui. 8.—Korean Panxixo CoNCENTR.\TES. A TRIP THROUGH NORTHERN KOREA. 609 The Korean furnaces are small and of rude construction andconsist briefly of a wall or back about 10 ft. high, againstwhich is built an oven about 3 ft. in diameter. The structuralmaterial is stone and mud. The oven is filled with ore andcharcoal and covered over with mud or clay, there being nochimney for the smoke and gases, which force their way outthrough apertures due to imperfect construction. The wall isbuilt sufiiciently high to protect the men working the blowerfrom the heat and gases from the oven. The blower itself isof wood and hide and is shown in position in Fig. 5. The latest igneous rocks, seen near the copper deposits, areporphyry dikes in the diorite. The gravel along the Chasungriver has been extensively washed for gold, which presumablycame from the copper deposits. To the southeast of TongJom is the Hagampo diorite area, likewise intruded into lime-stone
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
