. Official proceedings . d decreased from 72 to 16, or cent; the number of persons injured decreased from 1,560 to269, or per cent; the average miles per hour of trains infreight service increased from to , or per cent; thenumber of pounds of coal consumed per thousand gross ton milesdecreased from 167 to 119, or per cent; and the number ofpounds of coal consumed per passenger train car mile decreasedfrom to , or per cent. I have prepared a chart which illustrates the tendencies in-<licated by the foregoing statistics. It will be noted that the
. Official proceedings . d decreased from 72 to 16, or cent; the number of persons injured decreased from 1,560 to269, or per cent; the average miles per hour of trains infreight service increased from to , or per cent; thenumber of pounds of coal consumed per thousand gross ton milesdecreased from 167 to 119, or per cent; and the number ofpounds of coal consumed per passenger train car mile decreasedfrom to , or per cent. I have prepared a chart which illustrates the tendencies in-<licated by the foregoing statistics. It will be noted that the linesCasualties and Accidents closely parallel the line showingI)ercentage of Defective Locomotives. Where this percentage in-creases the number of Accidents and the number of Casualtiesshow corresponding increases and where the percentage of Defec-tive Locomotives decreases the number of Accidents and numberof Casualties show corresponding decreases. The steady declinein all three items is very noticeable since 1923. 91. 92 The shorter Hnes at the bottom of the chart are from top tobottom on the vertical hne 1923; pounds of coal per thousandgross ton miles, pounds of coal per passenger train car mile, andaverage miles per hour of trains in freight service. It will benoted that coincident with the improvement in condition of loco-motives represented by the line Defective Locomotives therehas been a corresponding reduction in the pounds of coal con-sumed per thousand gross ton miles and pounds of coal consumedper passenger train car mile, and an increase in average speed offreight trains from miles per hour in 1923 to miles perhour in 1931. There are fewer locomotive accidents today than at any timesince authentic records have been maintained with a marked de-crease in the number of boiler explosions and fire box failures asa result of low water and other causes. For instance, during1912 there were 94 accidents of this character as compared with14 during 1931, a reduct
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