Transactions . ng field is bituminous and pro-duces a good coke, but varies considerably in quality in differ-ent beds and at different localities. Mr. H. C. Hoover, con-sulting engineer for the mines, has made a minute study of thecoals, and proposes to divide them into three classes, as fol-lows:! * For a considerable part of the data relative to the average thickness andquality of the coal-seams at Tong-shan and Lin-hsi, I am indebted to C. , former engineer-in-chief of the Tong-shan mines ; H. C. Hoover,present consulting engineer for the mines ; and Kwong Yung Kwang, engineer ofth
Transactions . ng field is bituminous and pro-duces a good coke, but varies considerably in quality in differ-ent beds and at different localities. Mr. H. C. Hoover, con-sulting engineer for the mines, has made a minute study of thecoals, and proposes to divide them into three classes, as fol-lows:! * For a considerable part of the data relative to the average thickness andquality of the coal-seams at Tong-shan and Lin-hsi, I am indebted to C. , former engineer-in-chief of the Tong-shan mines ; H. C. Hoover,present consulting engineer for the mines ; and Kwong Yung Kwang, engineer ofthe Lin-hsi colliery. t Abbreviated from a written communication. THE CO \ I I 01 NOR rilEASTEKN CHIN \. !:• Class \. This class r:ur> >, and parts «»l m>. I. p.! i> .i\<hilt -Minplei of thii ooal, uncleaned. Tht muni of tin- ooal yield from 86 to I i r oent t lamp • oaL ( lass This ilass wouhl ioniprise tin- remaining portions of nami. /? -! ~ I. U 10 and 12, and would form the bulk of the coal at Tong-shan. Analysis No. 2,page 505, represents this class. Class C. This class would comprise seams Nos. 3 and 8 at Tong-shan, andNos. 8 and 9 at Lin-hsi. Analysis No. 3, page 505, is an average one from coalsof this class. 498 THB COAL-FIELDS OF NORTHEASTERN CHINA. II. The Wang-ping Coal-Basin. This name was applied by Pumpelly* to a belt of coal-bear-ing strata, from 12 to 15 miles wide by more than 30 milesLong, which extends due W. from the beginning of the hill-country W. of Peking. The information which he gave con-cerning the coal-beds consisted mainly of observations concern-ing individual mines, the extent and correlation of the bedsbeing left for later investigators to determine. His report hasserved a good purpose as a working basis. The next informa-tion of value as to the geology of this region came from Baronvon Richthofen,! who did some geologic work there in 1871,classifying and naming the different coal-
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