Steel shell is about 75 cm. Long and 22 cm in diameter. one large tubes known as fire tubes pass from end to end. At the front end of each tube a furnace fire grating is placed and a door is hinged.
Brick work, seating and flues are shown in wood work. The boiler is complete with deadweight safety vante, manhole, mudhole. Chock valve high steam a low water safety valve, steam and water gauges, regulating draught doors, dampers with counter weights and chimney. The is approximately one meter in length, 37 cm. In breadth and 45 cm. High. It is specially made dissectible for demonstration purposes.
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