. Journal of electricity. al-ers association has util-ized the office of theirsecretary and theirheadquarters in an ef-fective way, by cover-ing the walls with dis-plays from various elec-trical m a n u household appli-ances to lamp sockets,a wide selection ofwares is presented forthe careful study ofmembers or of othersespecially interestedwho may come in. Areading table complete-ly stocked with maga-zines of electrical inter-est adds to the value ofthe room. This up-to-date arrangement isthat of the CaliforniaAssociation of Electri-cal Dealers and Con-tractors, room 505, Ri-al
. Journal of electricity. al-ers association has util-ized the office of theirsecretary and theirheadquarters in an ef-fective way, by cover-ing the walls with dis-plays from various elec-trical m a n u household appli-ances to lamp sockets,a wide selection ofwares is presented forthe careful study ofmembers or of othersespecially interestedwho may come in. Areading table complete-ly stocked with maga-zines of electrical inter-est adds to the value ofthe room. This up-to-date arrangement isthat of the CaliforniaAssociation of Electri-cal Dealers and Con-tractors, room 505, Ri-alto Building, SanFrancisco. A WHIRLING DISC catches the eye of thepassers-by and calls their attention to the electricshop of Haller-Cunningham Company, 428 Marketstreet, San Francisco. The sign is perhaps the moststriking to be found the length and breadth of Marketstreet, and is one not easily forgotten. It consists ofthe simple optical delusion of a whirling spiral. De-pending on the direction in which it is turned, the. A sign that takes advantage of the popular interest in an optical delusion rings of color appear to be widening out from thecenter to the edge and dropping off the edge of itinto space, or narrow down and disappearing in thecenter like a funnel. If you have never witnessed thiseffect, try it with a spiral on a card, balanced on a pinin the center. To add to the interest, two lights atthe ends of radii revolve at the same interval. Thepicture shows the advantageous location of the store at an angle in the street intersections. It is so ar-ranged that the sign is readily seen from passingstreet cars and proves an effective business getter. TO REDUCE BREAKAGE in lamps, a Denverman worked out an ingenious scheme for protectingtheir tips, as reported in Factory. He was troubledby the large number of electric light bulbs broken bythe workmen. The breakage was not due to careless-ness on the part of the men so much as the extremefragileness of the glass tip of the g
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Keywords: ., bookcentury1900, bookdecade1910, bookidjo, booksubjectelectricity
