[Illustration: _Fig. 11._] Two Tube Cornish, 24ft. 6in. long, 6ft. 6in. diameter, tubes 2ft. 6in. diameter, 3/8 inch plates, 54 lbs., fitted with steam gauge, blow-off cock, 1-1/2 inch dead weight safety valve, loaded to 54 lbs., and 4-3/8 inch lever safety valve, loaded to 62 lbs., and had been at work about five years. Nearly the whole of the two back rings of the shell were torn off and opened out, and the boiler was turned partly round, and moved upon its seat sideways and forwards. There was extensive corrosion at the under side of the back of shell, where the first rent took place, caused by the leaking of the joints and seams. _No. 20. Swansea. (Fig. 12.) April 4th. 5 killed, 4 injured._ One Tube Cornish Boiler, 30ft. long, and 7ft. diameter, tube slightly oval about 4ft. diameter, 7/16 inch plates, 43 lbs., fitted with 3-1/2 inch safety valve, which is much too small for such a boiler, glass water gauge, two gauge cocks, and pressure gauge. The tube collapsed from end to end. The front end was blown out with a short length of the tube attached, and was driven against a wall about 30 yards to the front. The main body of the shell, and the back end, with the collapsed tube within it, were driven back against another wall, about the same distance away. Very great damage was done to the surrounding property. [Illustration: _Fig. 12._] The cause of the explosion was the weakness of the tube of so large a diameter, without strengthening rings, which made it unable to bear the ordinary working pressure. It is very probable, however, that at the time of the explosion, the pressure was considerably more than usual during the stoppage of the engine, and the confusion caused by a man becoming entangled in the machinery. _No. 21. Morpeth. April 10th. 1 killed._ Plain Cylinder Boiler, 34ft. long, and 5ft. diameter, 3/8 inch plates placed lengthways, 33 lbs. The explosion took place at a seam in the front part of the bottom of the boiler just over the fire. This rupture allowed the sides to expand, until the boiler was completely destroyed and torn into seven pieces. The cause of the explosion was supposed to be the defective state of the seams over the fire, which, being placed longitudinally, were in the weakest position. _No. 22. Shiffnal. (Fig. 13.) April 21st. none injured._ [Illustration: _Fig. 13._] Two Tube Cornish, 15ft. long, 6ft. diameter, tubes 1ft. 8in. diameter, 3/8 inch plates, 40 lbs. The heat was supplied by two furnaces, one of which played into each tube. The left hand tube collapsed from shortness of water, and tore away from the angle iron in the front plate, and allowed the contents to issue violently and scatter the brickwork, but the boiler was not disturbed. _No. 23. Burnley. April 26th. 2 killed, 2 injured._