An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 525
candle power. Calculatehow many candle power it gives per watt. 5. What is the illumination in foot candles on a surface 5 feet froman 80-candle-power lamp ? 6. The necessary illumination for reading is about 2 foot candles.How far away may a 16-candle-power lamp be placed? 470 ELECTRICITY AND…
Electricity · Magnetism
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