Revolving Rag boiler, 16ft. long, 6ft. diameter, 7/16 in. plates. There was no fire applied to the boiler itself, but it received steam through one end from other ordinary boilers at 50 lbs. pressure. There were two large rectangular manholes for putting in and taking out the rags, with cast iron frames and lids, attached by bolts with large nuts or clamps. The explosion appeared to have taken place when, in revolving, the manlids were approaching the bottom, and the first part to give way was at one of the manholes where the frame was previously broken. The cause of the explosion was the weakness of the manholes, which were very large, and both in the same line, and the attachment of the lids was insecure, as the bolts did not go through the lids, or in any way help to compensate for the large portion of the plate cut away. The boiler was only supported at each end, and had to act as a hollow girder to bear not only its own weight but the repeated shocks of the heavy material inside falling over and over in addition to the pressure. See Nos. 41 and 63, 1866. _No. 19. Glasgow. May 19th. 1 killed, 1 injured._ Two tube Cornish. One of the tubes collapsed for a length of 8 feet having become overheated through shortness of water. _No. 20. Durham. (Fig. 15.) May 29th. 3 injured._ [Illustration: _Fig. 15._] One of ten, 16 years old, Plain Cylinder with plates arranged lengthways, 34ft. long, 5ft. 6in. diameter, 7/16 inch plates, 50 lbs. pressure. The boiler gave way at one of the long straight seams near the bottom, and rent into five pieces, which were scattered to wide distances, but are so drawn in sketch as to show whereabouts in the boiler they came from. The boiler had been weakened by frequent repair until unable to bear the ordinary pressure. See No. 59. _No. 21. South Wales. (Fig. 16.) May 31st. 5 killed, 4 injured._ [Illustration: _Fig. 16._] One of three, very old, plain Cylinder, with flat ends, 34ft. long, 6ft. diameter, 3/8 inch plates, 40 lbs. pressure. There had formerly been a tube through the boiler, and when this was taken away new flat ends had been put in without sufficient stays to compensate for the loss of the tube. The front end was blown out, and the reaction sent the boiler upwards and broke it into three pieces. See No. 47. _No. 22. Bingley. (Fig. 17.) June 9th. 15 killed, 33 injured._ [Illustration: _Fig. 17._] Two tube Cornish, 16ft. long, 6ft. 9in. diameter, 7/16 inch plates, 50 lbs. pressure. Tubes 2ft. 6in. diameter. The bottom was so much corroded that it rent open, and the boiler was torn to pieces which were scattered to wide distances. The boiler had been much neglected and badly used, and the safety valve was insufficient, of bad construction, and overloaded, and the alarm whistle was gagged. _No. 23. Cornwall. June 14th. 1 injured._ Cornish, but no particulars have been obtained.