โ Scribed by Herbert E. Ives
No coin nor oath required. For personal study only.
IN the fourteenth century the Glover's Company, of London, decreed that " no one shall sell his goods by candle light ." When Tyrian purple was the staple cargo of the galleys of Phoenicia, it is safe to say that the buyers of that day early learned by experience to make no purchases by torchlight . Certainly it has long been known among those whose business it is to work with colors that daylight and "yellow candle light" are wide apart, not only in appearance, but also in their effect upon colors . It comes, nevertheless, as a surprise to many to learn how numerous are the industries whose working hours depend upon daylight . Color printing and lithography, dyeing, the painting and viewing of pictures, tobacco sorting, the grading of sugar and flour, the sorting of precious stones, the matching of colored fabrics, the inspection of meats and delicate chemical analysis-these are a few having need for daylight at all hours, to say nothing of the surgeon and the dentist.
Among women a knowledge of the defects and pitfalls of artificial light is more general than among men, doubtless because "Presented at the stated meeting held Wednesday, February I8, 1914 .
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