Portable Crane, 8 years old, 8ft. 3in. high, 4ft. 4in. diameter, with internal fire box, 6ft. high and 3ft. 6in. diameter, and chimney passing out at the top, 5/16 inch plates, 40 lbs. pressure. The internal fire box crushed in sideways, and the shell was rent into several pieces. The attachment of the fire box to the shell was made by bending the plates, as shown in enlarged sketch, and this is not so rigid as double angle iron and had evidently strained the chimney tube. This weakness had been so increased by deep corrosion just at the bend of the plates that it had given way. The havoc and loss of life was far greater than would have been supposed possible from so small a boiler, but similar cases are mentioned in No. 43, 1868, and No. 57, 1866. _No. 15. Durham. (Fig. 11.) April 23rd. none injured._ [Illustration: _Fig. 11._] One of two. Plain cylinder, with plates arranged lengthways, 30ft. long, 6ft. diameter, 3/8 inch plates, 9 lbs. pressure. A seam gave way on the right side over the fire and immediately rent along the straight seam from end to end, and the boiler was thrown in one mass a great distance to the left. The boiler was very old and much weakened by frequent repair, and at the time of explosion was being imprudently worked at twice its usual pressure for a temporary purpose. See No. 59. _No. 16. Bury. (Fig. 12.) April 29th. none injured._ [Illustration: _Fig. 12._] Double Furnace, internally fired, 28ft. long, 7ft. diameter, 7/16 inch plates, 55 lbs. pressure. Furnace tubes 7ft. long, 3ft. diameter, 3/8 inch plates. The crown of the left hand furnace collapsed and the right hand furnace was slightly altered in shape, as if from overheating by shortness of water, although the true cause was supposed to be the thickening of the water by use of anti-incrustation composition, preventing proper contact of the water with the plates. _No. 17. Liverpool. (Fig. 13.) May 12th. 1 killed, 1 injured._ [Illustration: _Fig. 13._] Plain cylinder, 10ft. long, 3ft. diameter, 3/8 inch plates, 50 lbs. pressure. The ends were flat made of plates, with turned edges, and there was such extensive corrosion on the inside of the bend that the back end came out and was blown 30 yards to the right and rear, the rest of the boiler being thrown to the front. The front plate had been repaired with angle iron where similarly corroded, and the shell was also much patched. The fractured edges were not 1/16 inch thick, so that the boiler was not fit to carry any pressure with safety. _No. 18. Abingdon. (Fig. 14.) May 13th. 2 killed, 2 injured._ [Illustration: _Fig. 14._]