Elephant Boiler, 20ft. long, and 4ft. diameter, 3/8 inch plates, and worked at low pressure. The bottom shell had a tube through its whole length. A rent took place in the lower part of the fireplace, and extended along the bottom, and the reaction of the issuing contents caused the top to rear up. The cause of the explosion was supposed to be that the bottom plates were worn too thin to bear the ordinary pressure. _No. 39. Sheffield. July 4th. none injured._ Two Tube Cornish Boiler, externally fired, 30ft. long, and 6ft. diameter, 3/8 inch plates, 40 lbs. The second seam over the fire gave way, and the plate sank down upon the fire. The cause of the explosion was the deterioration of the seams over the fire, in consequence of the deposit of scurf which could not be properly cleared off owing to the internal tubes. _No. 40. Oldham. July 14th. none injured._ Boiler, with two internal furnaces, 9ft. 6in. long, and 2ft. 11in. diameter, 3/8 inch plates, uniting into one tube beyond. The furnace crown collapsed near the front of the boiler. There was an extra weight upon the safety valve, and the steam valve was left closed, so that more pressure accumulated than the boiler could bear. _No. 41. Oxford. July 23rd. 3 injured._ Rag Boiler, not used for the generation of steam. It was a plain cylinder, with hemispherical ends, about 16ft. long, and 7ft. diameter. There was a neck at each end upon which the boiler revolved, and through one of these the steam was admitted to a pressure of 30 lbs., in order to assist in cleaning the rags. There was a large manhole for filling and emptying. The boiler rent in the middle, and each half was blown to some distance. The manhole was so large, that the strength of the boiler was too much reduced, and the constant strain of revolving caused a central seam to give way at the ordinary pressure. The sketch to No. 63 is of a similar boiler. _No. 42. Tunstall. (Fig. 19.) July 28th. 2 killed, 7 injured._ [Illustration: _Fig. 19._] Boiler, 36ft. 6in. long, and 8ft. 9in. diameter, 7/16 inch plates, with flat back and hemispherical front end, 36 lbs. A tube 3ft. 3in. diameter, passed from the back end nearly to the front, and returned to the back end, but of 6 inches less diameter and then passed to an iron chimney. The fire grate was beneath the hemispherical end. The angle iron of the flat back end gave way, and separated from the shell and with the tubes attached was blown to a good distance, and the reaction drove the shell far in the opposite direction. The cause of the explosion was the bad construction of the boiler, as the back end was quite unsupported, as there were no stays, and the bend of the tubes was not attached to the shell. An adjoining boiler which was being cleaned inside by two men, was rolled off its seat by the force of the explosion. _No. 43. Widnes. August 2nd. 2 killed, 6 injured._