OF THE IRK, LOCOMOTIVE ENGINE. 503 
this part of the boiler, immediately over the fire- 
box, there were nearly 29 cubic feet of steam. 
Hence, at the time of the explosion, there were 
55 cubic feet of steam in the boiler. 
4. The whole length of the boiler and fire-box 
was 12 feet. 
5. At the time of the explosion, the Engine 
was coupled to the Tender, by a bolt passing 
through two strong plates of iron; and, by bend- 
ing these plates, the Engine broke loose from the 
Tender. The Engine, on its motion forwards, 
broke six tie-beams, in the roof of the Shed, which 
were 15 feet above the level of the floor, on which 
the Engine stood; and the Engine was found im- 
mediately under the sixth tie-beam, in the next 
pit, on the south side of the Shed, with its wheels 
upwards, with the bottom of the boiler nearly 
vertical, with the fire-box end of the Engine 
downwards, and turned towards the opposite end 
of the Shed; so that the Engine, during the time 
of its motion, must have revolved through an 
angle of 180° at least. The length of each tie- 
beam was 39 feet 6 inches: its depth was 12 
inches; and its breadth 6 inches. The Engine 
was thrown horizontally to the distance of 30 feet 
