Two manuscript sheets concerning mines of the Ishikari coal basin located in central Hokkaido

ISHIKARI ?? COAL MINES

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Two large sheets of fine thin washi paper. [Japan: early 20th century]. The Ishikari coal basin contained the largest quantity of coal in Japan. The fields were first surveyed by the American mining engineer Benjamin Smith Lyman (1835-1920), who had been engaged by the Japanese government in 1872 to identify coals fields and oil deposits. 1. The first sheet (770 x 1860 mm.) is entitled "Kakuk? chis? kankei zu" ??????? ["Each Coal Mine Stratum, Illustrated"]. It depicts in fine colors of red, yellow, blue, and black, 13 core samples taken at various mines, all labelled, such as Y?bari ??, Sorachi ??, Bibai ??, Ponbetsu ??, Miruto ???, and Manji ?? The strata are labelled with Roman letters including I, UC, B, W, Y, K, A, T, N, H, and P (reflecting the Western influence on Japanese mining). 2. This sheet (770 x 2000 mm.) contains three images. The first, in the center, is entitled "Shin Y?barik? k?nai jissoku heimen zu" ??????????? ["Survey of New Y?bari Mineshafts Layout, in Scale, Illustrated"]. It is a map of the underground tunneling. The scale is 1/3000. The second title "Tans? danmen zu" ????? ["Cross-Section of Coal Seams"] accompanies two excellent images of cross-sections of hillsides with the coal seams shown. The scale here is 1/2000. Accompanying this image is a depiction of a boring sample with each stratum labelled. A few minor tears and flaws, but in fine condition. N° de réf. du vendeur 10813

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Titre : Two manuscript sheets concerning mines of ...