Fig. 7.
One of four. External shell is shown in dotted lines in sketch, to allow the tubes to be seen. It was 20ft. long, 7ft. diameter, 40 lbs. pressure. The two internal fire grates in the flues were 2ft. 8in. diameter, which joined at the back with a central return flue to a chimney passing out of the top of the boiler. The sides of flues were flattened to allow them to be packed closer together, and especially the central return flue, which was flattened on both sides, and thus rendered so weak that the left side collapsed and allowed the contents of the boiler to issue, blowing out the grate on the left side.
No.9. Halifax. ([Fig. 8.])
March 3rd.
none injured.
Fig. 8.
Plain Cylinder, with flat ends, 18ft. 6in. long, 3ft. 11in. diameter, 3/8 inch plates, 50 lbs. pressure. The back end gave way at the root of the angle iron all round, and was thrown 60 yards to the rear. The boiler was forced forward, and tilted up by the reaction of the issuing contents, and forced through a wall. The cause of explosion was the want of sufficient stays to the flat end.
No.10. Newcastle. ([Fig. 9.])