▁steam ▁leak ▁into ▁the ▁fire box ▁is ▁per il ous ▁enough ▁with ▁a ▁conventional ▁bo iler ▁– ▁the ▁fire ▁is ▁likely ▁to ▁be ▁bl asted ▁out ▁of ▁the ▁fire box ▁door , ▁with ▁unh appy ▁results ▁for ▁anyone ▁in ▁the ▁way . ▁With ▁a ▁high - press ure ▁bo iler ▁the ▁results ▁are ▁even ▁more ▁dangerous ▁because ▁of ▁the ▁greater ▁release ▁of ▁energy . ▁This ▁was ▁demonstrated ▁by ▁the ▁F ury ▁tra ged y , ▁though ▁the ▁reason ▁for ▁the ▁t ube ▁failure ▁in ▁that ▁case ▁was ▁concluded ▁to ▁be ▁over he ating ▁due ▁to ▁lack ▁of ▁steam ▁flow ▁rather ▁than ▁scaling . ▁ ▁Jacob ▁Per kins ▁An ▁early ▁experiment er ▁with ▁high - press ure ▁steam ▁was ▁Jacob ▁Per kins . ▁ ▁Per kins ▁applied ▁his ▁" h erm etic ▁t ube " ▁system ▁to ▁steam ▁locomot ive ▁bo ilers ▁and ▁a ▁number ▁of ▁locomot ives ▁using ▁this ▁principle ▁were ▁made ▁in ▁ 1 8 3 6 ▁for ▁the ▁London ▁and ▁South ▁Western ▁Railway . ▁ ▁The ▁Schmidt ▁system ▁ ▁One ▁way ▁to ▁avoid ▁cor ros ion ▁and ▁scale ▁problems ▁at ▁high ▁pressure ▁is ▁to ▁use ▁dist illed ▁water , ▁as ▁is ▁done ▁in ▁power ▁stations . ▁D iss ol ved ▁g ases ▁such ▁as ▁o xygen ▁and ▁carbon ▁dio x ide ▁also ▁cause ▁cor ros ion ▁at ▁high ▁temper atures ▁and ▁press ures , ▁and ▁must ▁be ▁kept ▁out . ▁Most ▁locomot ives ▁did ▁not ▁have ▁cond ens ers , ▁so ▁there ▁was ▁no ▁source ▁of ▁pure ▁feed ▁water . ▁One