Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 549
up through the fire, and will be closed whenthe fire is to be checked. From examination of Figs. 436to 445 it will appear that such doors may be either a single 512 MECHANICAL ENGINEERING OF POWER PLANTS. large door, two smaller doors closing a large opening, or twoindependent openings each with… … Fig. 440. register-openings in these doors, but they have comparativelysmall significance since it is much easier to leave the doorslightly open if but a little air is desired. The second set of doors open into the furnace or fire-boxon a level above the grates, and each will be called a fire-door.…
Mechanical engineering · Steam power plants
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