OUTLOOK FOR IRON — KEMP. 



305 



total bituminous coal reserves have been reduced by an arbitrary 

 fraction, which is assumed to represent the portion of coking grade 

 suitable to blast-furnace use. Much difference of opinion might 

 arise over this reduction. Its importance turns, however, upon the 

 ultimate result; that is, if the supply of coke proves to be a less 

 serious matter than the supply of ore, these fractions might vary 

 widely and yet not destroy the reliability of the final result. In the 

 further calculations I assume that two-thirds of the coal can be 

 ultimately mined, one-third being left in pillars. In passing from 

 coal to coke, I use the same percentages of yield for each of the 

 States as are given in the Mineral Eesources of the United States 

 Geological Survey for 1912, Part II, page 251. The estimates are, 

 moreover, within the probable reserves in this additional respect 

 that no account is taken of Illinois, although its weak coking coals, 

 when mixed with others in by-product ovens, gi^^e suitable fuel for 

 blast-furiiace use. 



Reserves of bitvminous eoal of coking grade in millions of long tons. 



Pennsylvania 



Ohio 



Maryland 



Virginia 



West Virginia 



Eastern Kentucky. 

 Western Kentucky 



Tennessee 



Georgia 



Alabama 



Total 

 bitumi- 

 nous. 



109,174 



85, 1.56 



7,802 



22, 391 



149,120 

 67,687 

 36, 104 

 25,509 

 920 

 68, 594 



Fraction for 

 coking. 



572, 457 



A= 



= 27,300 

 = 8,515 

 = 1,950 

 = 7,464 

 = 37,350 

 = 6,708 

 = 3,610 

 = 6,377 

 = 460 

 = 20,805 



120,659 



Two- 

 thirds 

 mined. 



18,200 

 6,676 

 1,300 

 4,976 



24,900 



4,512 



2,406 



4,251 



306 



13,910 



80, 437 



Per 

 cent. 



66.5 



69.2 



65.8 



62.2 



60.7 



62.4 



62.4 



54 



60 



Coke. 



12.100 



3,927 



855 



3,095 



15,114 

 2,815 

 1..501 

 2,295 

 153 

 9,027 



50,882 



The production of pig iron by States in 1912 — the maximum year 

 as 3'et — is given in the statistics in the next table in millions of long 

 tons. The figures are taken from the Mineral Resources for 1912 of 

 the United States Geological Survey. If we assume that the coke 

 consumption per ton of pig iron is one ton in those States where 

 Lake Superior ores or others equally rich are used, one and three- 

 quarter tons in Alabama, and one and one-half tons in West Vir- 

 ginia and Virginia we can make a rough estimate of the coke con- 

 sumption for pig iron manufacture in a maximum year. 



