Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 187
y must also be of such anature that the operation of closing or opening the door can be expeditiouslyperformed. These conditions are most commonly realized by the use of swing-ing bolts that are secured to a flanged mouth-piece that is riveted to the shell,the bolts swinging into slots on a similar…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
