This Boiler was 14ft. long, with hemispherical ends, and 7ft. diameter, 30 lbs.
The cause of the explosion was over-pressure and thinness of plates, wasted by corrosion.
No.69. Manchester. ([Fig. 32.])
December 15th.
5 injured.
Fig. 32.
Two Tube Cornish, 24ft. long, 6ft. 6in. diameter, tubes 2ft. 8in. diameter, 7/16 inch plates, 50 lbs. The boiler was fired in each of the tubes in the ordinary way, and also the heat from two furnaces passed from the back, one on each side of the outside shell.
Both the internal furnaces collapsed, until the crowns almost touched the fire bars, as shown in dotted lines, but without fracture. The back of the shell, on the right side, had evidently been overheated, and had rent along the centre of a bulge, and this rent had extended along the line of rivets of the transverse seam on each side, allowing two rings of the plates of the shell to open out flat as shown. There was a bulge on the plate, on the right side of shell, corresponding with the one which parted on the opposite side.