upported of boiler. on rollers, C, the latter resting on a plate, D, on the brick- In Fig. 6 is shown what is probably the best manner of work. By this arrangement the boiler is free to expand and setting a boiler in brickwork, namely, with double walls and contract under changes of temperature.… … to a sufficient hight, and fill in the space with dry earth or but this should only be done in the case of very short tubu- sand. Whichever course is pursued, the brickwork should and must be done with great care to make solid and stable lar boilers, and the roller support is preferable for every…
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