toward the cres- cent-shaped opening would impinge on the rings and tend to increase the difficulty without materially relieving the Rear end of boiler after explosion. Rear end of boiler before explosion boilers of pressure. One of these valves bore marks of • ®& having been jammed in this way so… … iron at the line A B; that the plate at this point was brittle; Boiler Explosion at Dayton Wheel Works. ignorance, bad iron, or bad workmanship; but it seems that this brittle iron was subjected to slight hinge-bending rather discouraging to such as desire to get an idea when motions, caused by…