Show IMPROVED Id idallie allce I 1 it on oil foul coal As an indication of the improve meat in coal mining nieth methods the statement contained in the report on coal by 1 1 W parker now be belay printed by the united state stat geological survey aa an an advance chaplet from front mineral resources for 1911 la is 0 of interest tho the number of machines machine used in mining coal in 1911 was Is an increase of five hundred and sixty five over 1910 the loading leading oal loal producing state pennsylvania la Is also first in the total tonnage mined by b the use of ma chinea and in the total number of I 1 machines in une use but in ha lie proportion of machine mined coal to tho the total output ohio far outranks all other states in 1911 production of machine mined coal was as short tona tons or 47 76 a G per cent of tho the total ohio a production clion of machine mined coal waa was short tons or 86 33 per cant cent t f the total ohio Is third in the production of machine mined coal though ranking fourth ln in th the total production west virginia tho the second state in coal production Is also second in the output ut of machine mined coal bl 4 1 in 1911 was short tons cr or 48 0 per cent of the he total illinois Is fourth in the quantity of machine mined coal mith 23 abort short ton on although the total production of bituminous coal in the united states decreased from front shore tons tn in 1910 to short tons in 1911 the quantity of coal undercut or otherwise mined wined by the use of machines increased from short tons to tons the percentage 0 of the ma machine chino ml nil ed led tonnage to the total eitt output put from 41 74 in 1810 1910 to 43 89 in fit 1911 cipully Cipul blo lu 4 f laige bureal iriti viam the progress pr made 1 in recent ira irs in in tho the but substitution ct cf me ii rue methods thodi in the waning of coal hai has been cm cne of the most antei sting developments li ta ha tho history of the industry it has been eon stated by those who are fa ml lar wita bituminous coal mining in the united states that tho h mines at breont developed are capable of producing with a plentiful supply of r labor and ample tr facilities from 60 50 to 75 per cent ni ire than the high record of 1911 and een higher record of 1910 it la Is probably pro bibly not an exaggeration to state that tho the bituminous i mines of tho the united stales states could produce from front hix hundred to seven hundred million ton tom of coal without opening mother new mine in order to this condition and also to meet the general tendency toward cost of labor operators I 1 ao been impelled to the utilization of labor and expense redic ing machinery greatti bi cavil in addition to the less lessening efting of the mining cost however there aro arn two to other alms to be accomplished by the use of mining nuit machines chInes tho the of coal by hand liand Is one of the moot exacting kinds of labor and the ugo of machinery materially reduces the arduous task tasks of the laborer more important than thi however it Is parker a belle belie Is the greater snotty secured through reducing the practice too prevalent in min man mining willing of shooting from the solid this practice aan an not be tt strongly condemned for it increases iacre inea the liability to accident and Is contrary to the principle ol 01 conservation in that it produces n considerable quantity quan titi of un 11 or unmarketable fuel |