. The Locomotive . should continue to 1919. If accurateinformation in regard to the number of boilers in use during each ofthese years were available it would be of considerable help but certainlythe number of boilers in use in the past ten years has increased at leastas rapidly as in the previous period. The drop in the curve is un-doubtedly due to better construction, better care and more heed to theadvice of the boiler inspector. Considering next the variation in Persons Killed, as shown inChart Xo. 2, on page 103. we find at first a very slight decreasefollowed by a general increase which
. The Locomotive . should continue to 1919. If accurateinformation in regard to the number of boilers in use during each ofthese years were available it would be of considerable help but certainlythe number of boilers in use in the past ten years has increased at leastas rapidly as in the previous period. The drop in the curve is un-doubtedly due to better construction, better care and more heed to theadvice of the boiler inspector. Considering next the variation in Persons Killed, as shown inChart Xo. 2, on page 103. we find at first a very slight decreasefollowed by a general increase which is interrupted in two successiveyears by a decline but which rises again to the peak of 398 in general decrease then begins which again is broken by a sharp up-ward saw-tooth in 1905. In Chart Xo. 3 on page 103 we have the variation in PersonsInjured. The irregularities are very marked but there is a generalrise to 646 in 1901 and then a decided falling ofif in the later years. The THE LOCOMOTIVE 105. Chart No. 5. — Persons Killed per Explosion. 1 I h \- : r ,«L± V 1 ^ i - . 0 -1 3 -ff- ^ 3 1 4^- X -r ^ t ^ t^^\: TVT M^° 1 I ^uii n t+ bd2t Q- -;-—^7^^^ Q n . ^ .c ± ^:^c ^>^ a STti: ^^i ^^^^5 ^ ^s i 3 ^ ^ ti H ^ ^^ J^ t^v a7^ ^^ ^ v?t ^ 3LIVV 0 jZ-^v (0 1 i ^s vv7^- q: i_ N, - ^ e Q. .5 -\- 900 9 35 910 1915 1 18 BO 88b 890 895 Chart Xo. 6. — Persons Injured per Explosion. 106 THE LOCOMOTIVE. [October. oto X UJ a UJ 0 QUJ q:| Q _l X J 100 ■ r 20 ^ \ \ ^ N / / , \ / V / \ * ?..^ 1 r \ \ y — 1^ 1 i \ 1 \ I ^ 1 \ / / \ s ... / S. _ s 1 \ / a r ~ ~ 8 8 D - - 8 9 T - - 8 9 3 - 9 0 ) - 9 0 5 9 10 - - 9 15 - - 9 Chart No. 7.^Total Killed and Injured per Explosion. average height in the past five years, in fact, is below that in the periodfrom 1880 to 1885. The variation in the Total of Killed and Injured as shown in ChartNo. 4 on page 104 and which is. of course, the result of the addition ofthe figures of Charts N
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