Charles Hutton Gregory,
Practical Rules for the Management of a Locomotive Engine
“ When the water in the boiler is high, many Engines begin to prime, especially after running for several days. When this occurs, the aperture of the regulator should be diminished, and the fire-door and the discharge cocks of the cylinders opened: if the height of the water will allow it, the blow-off cock of the boiler may be opened for a short time to carry off the sediment, which will be found advantageous.The Engine-man should frequently look to the working gear, to see that it is in proper order, and to rectify any deficiency at the next Station. ”
