Laboratories, their planning and fittings . ed on inthe optical room in which the necessary sink and supplies are provided, but aspecial room with two doors separated by a lobby and a window with suitableorange-tinted screens and dark blinds is desirable. Though complete dark-ness is not essential for lecture purposes or usually for optical work, wheresensitive plates have to be exposed the conditions are naturally of a verystringent character. For night work an electric lamp in series with a resist-ance, or two lamps, one of a voltage higher than for the general lighting,will be found useful
Laboratories, their planning and fittings . ed on inthe optical room in which the necessary sink and supplies are provided, but aspecial room with two doors separated by a lobby and a window with suitableorange-tinted screens and dark blinds is desirable. Though complete dark-ness is not essential for lecture purposes or usually for optical work, wheresensitive plates have to be exposed the conditions are naturally of a verystringent character. For night work an electric lamp in series with a resist-ance, or two lamps, one of a voltage higher than for the general lighting,will be found useful to admit of a dimmed or normal light as lamps are either of tinted glass or are enclosed by coloured screens. Mechanics —In a mechanical laboratory a comparativelysmall amount of work is done seated at specific tables, hence a bench for eachworker is hardly necessary. Much of the apparatus is disposed round thewalls of the room, very little space upon which can be devoted to benches or /V£T /^» /^ff/9 i07S.
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherlondo, bookyear1921
