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RUNNING WITH LOW STEAM.
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There are engineers who habitually carry merely sufficient steam to get them along on time, under the mistaken belief that they are working economically. John Brown runs steadily, and takes as good care of his engine as any man on the A.&B. road; but he dislikes to hear the steam escaping from the safety-valves, and prevents it from doing so by habitually using steam thirty pounds below the blowing-pressure. The consequence is, that he always makes a bad record on the coal-list, compared with the other passenger men.
THE THROTTLE-LEVER.
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In the interest of economy, the throttle-lever should be kept wide open when practicable, and the speed regulated by the reverse-lever. Experiments with the indicator have demonstrated beyond a doubt, that running with the throttle-valve partly closed, wire-draws the steam before it reaches the cylinders, whereby the initial pressure is materially reduced, and its power for expansive work seriously diminished.