What is the proper height of water to carry in the boiler?
A. Carry water and steam in the top gauge-cock when working steam. Q. 5. What should be the condition of the water supply in the boiler when the locomotive ascends a grade? A. It should be sufficiently high to prevent the front ends of the tubes from being uncovered and exposed to the fire. Q. 6. What should be the condition of the water supply in the boiler when the locomotive descends a grade? A. It should be sufficiently high to cover the back end of the crown-sheet. Q. 7. What do you consider the best and most economical method of supplying water to the boiler? A. To regulate the feed so that the amount of water delivered is in proportion to the work which the engine is doing. On approaching a steep grade, as much water should be fed into the boiler as it is safe to carry without danger of priming. The condition of the fire should be such also as to heat the water as hot as possible before reaching the grade. The reason for this is, that as the boiler is often taxed to its utmost c
