Abstract
The constitution and properties of glass are discussed with reference to the requirements of a light-transmitting material for use in lighting fittings, and the principal processes of manufacture are briefly described. The optical principles of light control by reflection and by refraction are compared, and data given for the reflecting, refracting, diffusing, and absorbing properties of glass, including coloured glass. Some indication is given of the precautions to be taken in design and construction of lighting fittings using glass components.
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