One of four. One tube Cornish, 15ft. long, 4ft. 7in. diameter. Tube 2ft. 8in. diameter, 1/4 inch plates, 60 lbs. pressure. The tube collapsed and rent open near the bridge, owing to its weakness with such thin plates and no strengthening rings. _No. 13. Cornwall. May 1st. 1 killed._ No details obtained. One tube Cornish. Tube collapsed, owing to its weakness without strengthening rings. _No. 14. Cornwall. May 9th. none injured._ Few particulars obtained. One tube Cornish, 34ft. long. Tube 4ft. diameter, 3/8 inch plates, 40 lbs. pressure. Tube collapsed owing to its weakness without strengthening rings. _No. 15. Oldham. May 11th. 1 killed, 1 injured._ A very small plain cylinder, 3ft. 5in. long, 1ft. 8in. diameter, 1/4 inch plates, 45 lbs. pressure. It burst at a faulty place at the lower part of the back, on the left hand side, allowing the hot water to issue, but the boiler was not much disturbed. _No. 16. Bristol. May 11th. 1 killed._ Marine. Single internal fire grate, with small return tube, 7ft. 9in. long, 5ft. 4in. diameter, 3/8 inch plates, tube 2ft. 7in. diameter, 1/4 inch plates, 62 lbs. pressure. Tube collapsed and rent open owing to its weak, corroded, and deteriorated condition, and the contents issued so violently, as to cause much damage to the boat. _No. 17. Hull. (Fig. 10.) May 12th. 2 killed, 2 injured._ [Illustration: _Fig. 10._] One of two. Plain Cylinder, 4ft. 9in. long, 3ft. diameter, 1/4 inch plates, 25 lbs. pressure. This was a second-hand boiler, and rent into several pieces just after being put to work, owing to its having become thinned to 1/8 inch by corrosion. _No. 18. Coatbridge. May 15th. 1 injured._ Plain Cylinder, flat ends, 15ft. long, 5ft. diameter, 3/8 inch plates, 30 lbs. pressure. The back end blew out and caused considerable damage, and the boiler was thrown some distance. The end was very insufficiently stayed. _No. 19. Gravesend. (Fig. 11.) May 28th. 2 killed._ [Illustration: _Fig. 11._] One of two. Marine, 13ft. 5in. long, 7ft. 2in. diameter, 5/16 inch plates, 25 lbs. pressure. The fire was in two internal furnace tubes united at the back, and the flame was returned to the front by four smaller tubes. The furnace tubes were of exceedingly weak shape as the sides followed the curve of the shell, but were not attached to it by proper stays, so that the left hand tube collapsed upwards, and one seam rent open and allowed the contents to violently escape. It is probable there may have been greater pressure than usual at the time, but the furnaces without stays were unsafe, even at the ordinary pressure. _No. 20. Durham. (Fig. 12.) June 8th. 2 killed._ [Illustration: _Fig. 12._]