Fig. 10.
Cornish, 12ft. long, 4ft. 8in. diameter. Tube 2ft. 3in. diameter, 3/8 inch plates, 72 lbs. pressure. Tube collapsed downwards from overheating through shortness of water. This was the second time the tube had collapsed, although the boiler had only worked 18 months.
No.21. Newcastle. ([Fig. 11.])
March 16th.
1 killed.
Fig. 11.
Plain cylinder, flat ends, 16ft. long, 3ft. 6in. diameter, 5/16 inch plates, 25 lbs. pressure. There being no stays to support the flat ends the varying pressure caused a slight movement backward and forward (sometimes called "drum-head" motion), which facilitated corrosion in certain lines of strain, and produced a "furrow" at the front near the bottom, which rent open. The boiler was not moved, and little damage was done to the premises.
No.22. Brigg. ([Fig. 12.])