Miners Safety Lamp Small 183×320 Medium 366×640 Large 585×1024 Download Tiff Original 1372×2400 | (434.5 KB) Description An artificial source of visible illumination, an oil lamp that will not ignite flammable gasses. Keywords brightness, brightness level, illumination, lamp, luminance, Luminosity, luminousness, source of illuminance Galleries Mining Source: Government Printing Office Official Gazette (Washingon, DC: Government Printing Office, 1912)
