Lux

A standard of illumination, q. v., as distinguished from illuminating power. It is the light given by one candle at a distance of 12.7 inches--by a carcel, q. v., at a distance of one meter---or by 10,000 candles at 105.8 feet. It was proposed by W. H. Preece. All the above valuations are identical. 332   STANDARD ELECTRICAL DICTIONARY. **M** (a) Symbol of gaseous pre ure equal to one-millionth of an atmosphere. (b) The Greek m, µ, is used as the symbol of magnetic permeability. 333   STANDARD ELECTRICAL DICTIONARY.