▁source ▁of ▁trouble . ▁The ▁French ▁type ▁of ▁Belle ville ▁bo iler ▁was ▁introduced , ▁pract ically ▁dou bling ▁the ▁steam ▁pressure . ▁Sub sequently ▁other ▁types ▁were ▁adopted , ▁and ▁the ▁Belle ville ▁bo iler ▁was ▁disp ensed ▁with . ▁▁ ▁James ▁Bed bro ok ' s ▁rise ▁through ▁the ▁service ▁is ▁as ▁follows ; ▁▁▁ 1 8 6 7 : ▁Ass istant ▁Engine er ▁▁ 1 8 6 9 : ▁Engine er ▁▁ 1 8 7 7 : ▁Chief ▁Engine er ▁▁ 1 8 8 6 : ▁Fle et ▁Engine er ▁▁ 1 8 8 9 : ▁Ins pect or ▁of ▁Mach in ery ▁▁ 1 8 9 4 : ▁Chief ▁Ins pect or ▁of ▁Mach in ery ▁ ▁Wh ilst ▁serving ▁in ▁the ▁Royal ▁Navy , ▁Bed bro ok ▁argued ▁for ▁better ▁working ▁conditions ▁for ▁his ▁men , ▁higher ▁sal aries ▁and ▁better ▁social ▁inclusion ▁for ▁the ▁engineer ▁ranks . H is ▁greatest ▁role ▁to ▁poster ity ▁in ▁regard ▁to ▁his ▁career ▁in ▁the ▁Royal ▁Navy ▁is ▁his ▁success ▁in ▁obtain ing ▁military ▁rank ▁( or ▁titles ) ▁for ▁engine ers ▁and ▁techn icians ▁within ▁the   service   as   opp osed   to   the   c ivil ian   tit les   they   pre viously ▁held . ▁ ▁Death ▁Bed bro ok ▁retired ▁in ▁ 1 9 0 1 ▁and ▁the ▁following ▁year , ▁aged ▁ 5 7 , ▁he ▁died ▁from ▁the ▁result ▁of ▁a ▁serious ▁operation , ▁due ▁to ▁append ic itis . ▁He