Electrical news and engineering . Switchboard in blast furnace gas engine power houseAlgoma Steel Corporation if possible symmetrically with reference to the bays intowhich the trusses of the building naturally divide it. In buildings with extremely high ceilings, exceedingthe width, the mounting of light sources on the trusses would result in a considerable portion of the lightrays striking the upper section of the walls. With ordinaryconditions of dark and dirty walls, the light reflection is solow that the resultant illumination is inefficient. In suchcases .ingle reflectors, as shown in Fi
Electrical news and engineering . Switchboard in blast furnace gas engine power houseAlgoma Steel Corporation if possible symmetrically with reference to the bays intowhich the trusses of the building naturally divide it. In buildings with extremely high ceilings, exceedingthe width, the mounting of light sources on the trusses would result in a considerable portion of the lightrays striking the upper section of the walls. With ordinaryconditions of dark and dirty walls, the light reflection is solow that the resultant illumination is inefficient. In suchcases .ingle reflectors, as shown in Fig. 2, mounted not lessthan twenty-five feet high along each -^idp w:ill will pro-. Blast fu ngine power house at plant of Algoma Steel Corp. vide an excellent installation. They should be spaced notfarther apart than one and one-half times their height abovethe floor. With the overhead cc|uipnient. that may of neces-sity l)c above a crane, these angle reflectors mounted undertile crane rails will sup]>Iement the general ilhmiination,aiding especially that on llie vertical surfaces. Types of Reflectors Direct lighting is. of course, the most economical forsteel mill work, supplied by the larger lamps fitted i)refer-ably with porcelain enameled steel reflectors. These arcmore durable than the glass units although the latter mayhave a trifle higher initial efficiency. The enameled steel isnot affected by moisture, ordinary atmospheric conditions,or acid fumes. It also has the advantage of being easilycleaned :in(l will natmally withstand relatively rough service. Electrified Mill is Cheaper In itself the equipment and power cost of the electrifiedmills may not be lo
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