A Treatise on Industrial Photometry with Special Application to Electric Lighting |
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acetate of amyl Alternate Current amperes angle apparatus arc-lamps Argand Argand burner axis brightness burner calculated candle power carbon carcel lamp cent Charles Salter cloth coefficients color combustion constant Construction consumption corresponding Crova curve D. K. Clark determined diagrams diameter diaphragm diffuser disc distance employed energy Engineers equal equation exact filament flame formula give glass grams Handbook Hefner height horizontal intensity I₁ illus illustrated incandescent lamp intensity of illumination Krüss light emitted luminous intensity maximum mean spherical intensity Mechanical method mirror movable Nicol prism normal NOSTRAND COMPANY'S numerous observer obtained pencil pentane petroleum lamp photometric bench photometric measurements photometric standard placed plane plates platinum polarized prism produced Prof quantity of light radiants ratio rays revised and enlarged Second edition source of light spermaceti stearine surface temperature tion tube variations varies voltaic arc wave-length wick Wollaston prism
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