near the walls—the heat de- We have shown it in operation; A, being a frame below which the water must not fall. mounted on wheels, B, and C, D, i, are three parallel The operation is very simple. When the chamber, G, creasing gradually towards the center. and pipe, F, are filled with water, and… … the outer side of the frame, which receives a rope or chain, IMPROVED LOW WATER INDICATOR, the boiler, no effect takes place; -but the moment the G, to which the animal is attached to operate the ma- This indicator acts by the expansion of water in a water falls below its proper level the steam…
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