Transactions . B --300 --200 J-0 of these seams is shown in Fig. 4. Beginning * An account of this mine, with illustrations showingmethods of mining and apparatus, by Kwong Yung Kwang, Average Section engineer at the mine, was published in Trans., xvi., 95 of Strata of Kai- (1887) ping --100 Hh; tmh GOAL-FIELDS OF NORTH EASTERN CHINA. a1 the top, they pun, ae to thickness and quality, about as follows :* 9eam No. Feet. 1. (lood coal, . . . . 1 .•) 2. (lood coal, . . . . . 3. Friable and poor coal, ....... 7 4. About 1 5. This seam furnishes the best coal that is mined at Tong-
Transactions . B --300 --200 J-0 of these seams is shown in Fig. 4. Beginning * An account of this mine, with illustrations showingmethods of mining and apparatus, by Kwong Yung Kwang, Average Section engineer at the mine, was published in Trans., xvi., 95 of Strata of Kai- (1887) ping --100 Hh; tmh GOAL-FIELDS OF NORTH EASTERN CHINA. a1 the top, they pun, ae to thickness and quality, about as follows :* 9eam No. Feet. 1. (lood coal, . . . . 1 .•) 2. (lood coal, . . . . . 3. Friable and poor coal, ....... 7 4. About 1 5. This seam furnishes the best coal that is mined at Tong- shan. The ash averages about 7 per cent. Coal-analysis No. 4, page 505, is that of a piece from this seam. Average thickness about. .... 5 0 2 7 2 8. Poor coal, ......... 8 9. ) These lie together usually, and have an average com- 10. i bined thickness of about ...... 25 11. Good coal, but not worked ; thickness about ... 2 12. This seam has an average thickness of about . .20 If we exclude every seam that does not exceed 2 ft. in thick-ness we still have an aggregate thickness of coal of about65 ft. At Lin-hsi, the coal-seams are, on the whole, somewhatthinner than at Tong-shan. The four larger seams averageabout 15, 8, 4 and 3 ft. respectively. When I first visited the
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
