Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 464
the crystals of cobalt, but, too, they give the metal an ex-tremely hard cutting edge just as the copper disc used for cutting stoneis made hard by impregnating its edge with diamond dust. Dependence on Surface Cleaner Was Costly AN accumulation of sediment in the bottom of a horizontal tubular /A… … feed water by means of a lime and soda ash treatment and had in-stalled a surface cleaner or skimmer which he supposed would keepthe boiler free from sediment without the necessity of periodic internalwashing. After operating in this way for three months the boilerruptured. The cause was readily…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
