Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 374
sed, as well as withthe direction in which the candle-power is measured and the typeof globe used. For a 100-hour run on a two-glower, 220-volt Fig. 22. 811 3:) ELECTRIC LIGHTING lain I) iisiiio; a 0-incli lijrlit sand-blasted elol)e. the watts variedfrom 17(1 to 158, while tlie mean… … Fig. 25. Fig. 25 shows two distribution curves for ISernst lamps. To give the best results, lamps using the tubeheaters juustbe cleaned recrularlv at the intervals of about 100 hours of burninir.The spiral heateiS are not cleaned, but are renewed at the end ofthe useful life of the glower. The…
Architecture · Building · Carpentry
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