LIGHT AND VISION

摘要

[Abstract of an Address by Sir John Parsons to the Illuminatiñg Engineering Society on May 11, 1943.The Illuminating Engineering Society was founded by Mr. Leon Gaster in 1909 for the purpose of promoting “good lighting,” i.e. lighting “adequate and suitable” for the given performance. It was designed to represent all aspects of the subject, and its members include gas and electric light experts, physiologists, ophthalmologists, architects, and others. The writer is an original member, past president, and fellow of the Society.]