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 [No. 41] and [No. 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.
Fig. 15.