Lighting for Country Homes And Village Communities
Lighting for Country Homes And Village Communities
William Kunerth
The book Lighting for Country Homes And Village Communities was written by author William Kunerth Here you can read free online of Lighting for Country Homes And Village Communities book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Lighting for Country Homes And Village Communities a good or bad book?
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Kerosene pressure lamp 1, 950 15c per gal. Acetylene (bare flame) 300 3. 5c per Ib. Acetylene (mantle) 1, 000 3. 5c per Ib. Gasoline (mantle) . 2, 000 20c per gal. Carbon (incandescent) 300 lOc per kw. H. Gas (mantle) 1, 200 $1. 00 per 1, 000 cu. Ft. Mazda B (vacuum) 900 lOc per kw. H. Mazda C (gas filled) 1, 300 lOc per kw. H. Blau-gas (mantle) 335 lOc per Ib. 30 Fig. 26 31 The relative lighting capacity is given in lumens-hours for one cent. A lumen-hour may be explained thus ; if the light f...rom a standard can- dle falls normally upon a screen, which has an area of one square foot, placed one foot from the candle, the amount of light received by the screen is designated as one lumen. If this amount of light continues to fall upon the screen for one hour the amount of light thus received by the screen is one lumen-hour. In the preceding table no attempt is made to take account of plant depreciation, interest on money invested, cost of labor for refilling, cleaning, trimming, and recharging, cost of mantles and wicks, bulbs, matches, chimneys, cost of repair, taxes and insurance.
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