Cornish, at 27 lbs., but as the boiler was not injured, it is only noticed as an explosion, because of the imprudence of placing fittings in such dangerous positions. The boiler was beneath a work room, and the lever of the safety valve became displaced, allowing the valve to blow out, and the escaping steam rushed into the room above and scalded seven men very badly. _No. 15. Manchester. March 6th. 1 killed._ This was a Boiler with two internal fireplaces, connected into one flue at the back. The crowns of both furnaces were collapsed, and slightly rent, and the escaping steam and water scalded the attendant. The water was 8 or 9 inches below its proper level, allowing the furnace crowns to become overheated and unable to bear the working pressure. Each furnace had been fitted with a fusible plug, but they proved inefficient. _No. 16. Norwich. (Fig. 9.) March 13th. 1 killed, 1 injured._ [Illustration: _Fig. 9._] This was a very small boiler, 8ft. long, and 3ft. 2-1/2in. diameter, with two small tubes. It was fired externally. The dome was blown off and the rents continuing, the top opened out on each side, and the upper portion of both back and front was bent back. The dome cut away the whole of the top plate, and so much reduced the strength that it would not bear the ordinary working pressure. _No. 17. Dudley. (Fig. 10.) March 19th. none injured._ [Illustration: _Fig. 10._] Plain Cylinder Boiler, 36ft. long, 5ft. 6in. diameter, 60 lbs. It had frequently been repaired over the fire, so that the longitudinal seams ran for several plates without break of joint. A patch had been put on a few days before explosion, and as the rivet holes had badly fitted, there had been much strain caused by drifting, and the rivets were much distorted. A longitudinal seam gave way over the fire, when two rings of plates opened out, rending the transverse seams at each side until completely separated, and fell in two parts at a distance of about 100 yards in front of the boiler. The front end was liberated and fell in one piece about 100 yards beyond the two pieces of the shell. The main body of the boiler was driven back a few yards and rolled over so as to be upside down, but was little injured. The frequent and badly executed repair over the fireplace, had so weakened the structure as to make it unable to bear the very high ordinary pressure. This frequent repair over the fireplace had been made necessary by very hard firing and deposits of scurf from muddy water, preventing the proper contact of the water with the plates. _No. 18. Liverpool. March 22nd. 1 killed._ This was a small Boiler to supply steam for some steam winches on board a steam boat, and exploded from the overheating of the upper tubes through shortness of water, or from over pressure in consequence of having only one safety valve. _No. 19. Leeds. (Fig. 11.) March 27th. 2 killed, 18 injured._