Fig. 9.
Cornish, 5 years old, 32ft. long, 7ft. diameter. Tube 2ft. 4in. diameter, 7/16 inch plates, 30 lbs. pressure. Cracked along the bottom of front end where internally "furrowed." The boiler was not disturbed, but as the water escaped into an iron furnace the bricks were scattered, but little damage done. The boiler was intended for two tubes, and therefore there was a large part supported only by stays, allowing of a slight movement with varying pressure which facilitates the corrosion in certain lines of strain called "furrowing." In this case they were so close to the angle iron and filled with scale that they were difficult to detect.
No.10. Cornwall. ([Fig. 10.])
March 17th.
5 injured.
Fig. 10.
Upright Boiler, 2 ft. high, 1ft. 9in. diameter, ¼ inch plates. It gave way where deeply corroded externally round the bottom angle iron. The top was blown through the roof and did considerable damage, the bottom being left in the grate.
No.11. Sheffield. ([Fig. 11.])
March 27th.