Focussed by turning a screw, a recently invented lamp shade is said to be capAble fef controliing in Ci sixnplo naahnor tlia intcnsity and spread of iight from a lamp, The height to which a wall ean be illuminated is also variable at will. Made from parqhment, thin slxeet metal, or plastie in the shape of a split ring, tho Blind 0 is arranged eo that one edge of tho split portion can rido ovor the otlxer, causing it to take on a conieal shape of any desirod focus, The adjustment xs controlled by means of a thumb screw.
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https://paperspast.natlib.govt.nz/newspapers/HBHETR19370813.2.123.3
Bibliographic details
Hawke's Bay Herald-Tribune, Issue 177, 13 August 1937, Page 10
Word Count
99Page 10 Advertisements Column 3 Hawke's Bay Herald-Tribune, Issue 177, 13 August 1937, Page 10
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