Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 414
DirScharge—^ElhoiA/ Safety Holes Figure 1 pletely through at this point, resulting in loss of material and possibledanger to persons. Drill testing by merely drilling through the metal and then measur-ing the thickness, sealing or plugging the hole afterward, has been aboutthe only method for…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
