Identifier: americanengineer82newy (find matches)
Title: American engineer and railroad journal
Year: 1893 (1890s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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r, duringthe past three years, had for their cardinal purpose the compari-son of one character of fuel with another. It was hoped—andin part only was that hope realized—that the engineering inves-tigations would give us results even more valuable than theywere ; but the equipment which we were compelled to use in thebeginning was selected because it represented the ordinary powerplant in use in the United States, and the comparisons of thevarious fuels have been made on this equipment with only suchslight modifications as were feasible at the time. It has been common to find, where there is a vein eight feet111 thickness, that two or three feet is left unmined and is per-manently lost, because of the subsequent caving in of the mine.We have found, furthermore, that there is no sharp line drawnbetween high grade and low grade fuels; that in certain minesthe amount of coal left unmined, under the ground, exceeded 75per cent, of the total available coal, ami the average result is 121
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c > o ! s - ■/ ri □ S. _ * ■ SJ —. rt ^ >> zt. £ 8 cl *■* ■^ . -5 ^ :C s cz : — 3. ... i ~ 6 J ; c -2 C -5 — - r — o « - ■— S W 5. o ~ ■ - — C O O — C IS 2 O t/i <s. *H r-> V a O u Jj u ?2 J3 c r 7 - « ;: * s o - - O rt W r =- JZ o s 7 (L ;; f 5 a g a ,-x ~ u April, 190S. AMERICAN ENGINEER \.\l> RAILROAD JOURNAL. 123 that al least 50 per cent, of the possible coal suppl) in these wins1- left under the ground and unrecoverabli I recall oniin particular in which out of a possible 25 foot vein oi coal,onlj foui feel were taken out, because of unskillfulness in min-ing, ;n 1»1 the resl left underground and practically destnIln carelessness with which coal miners have gon< to workmining the lower seams and allowing cave ins to follow, has hadtin- result i leaving the coal in the higher seams unmined andpractically lost because of the caving in of the adjacent material.In West Virginia, and i

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