Science for beginners . Fig. 41.—Second floor plan of a modern residence showing system ofelectric lighting; also other electric appliances. so constructed as to give only diffused light. This is especiallytrue of gas and electric lighting. The gas mantle is oftensurrounded by a suitable opal glass globe; the lower portionof the electric light globe is frosted, while the upper portionis surrounded by a reflector which diffuses the light. Figure42 shows how the direct, parallel rays from the tungsten light NATURAL AND ARTIFICIAL LIGHTING 57 are diffused by the frosted bowl, and Fig. 43 shows ho
Science for beginners . Fig. 41.—Second floor plan of a modern residence showing system ofelectric lighting; also other electric appliances. so constructed as to give only diffused light. This is especiallytrue of gas and electric lighting. The gas mantle is oftensurrounded by a suitable opal glass globe; the lower portionof the electric light globe is frosted, while the upper portionis surrounded by a reflector which diffuses the light. Figure42 shows how the direct, parallel rays from the tungsten light NATURAL AND ARTIFICIAL LIGHTING 57 are diffused by the frosted bowl, and Fig. 43 shows how thedirect rays from the gas mantle are diffused by the white.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscience, bookyear1921
