. Light and lighting. guesof the future. ACETYLENE SAFETY LAMPS IN MINES. A Competition. We notice that a competition for acety-lene lamps for fiery mines is beingorganised in Geneva, and that a sum of5,000 francs is to be awarded for thelamp which best fulfils the requirementsas regards safety, and technical andeconomical working. Competitors should apply to the Secre-tariat International du Carbure de Cal-cium, 5 Rue des Geanges, Geneva, forfull particulars. AUTOMATIC LIGHTING OF STREETLAMPS. A Corporation desiivs informationregarding systems of automatic or agents are
. Light and lighting. guesof the future. ACETYLENE SAFETY LAMPS IN MINES. A Competition. We notice that a competition for acety-lene lamps for fiery mines is beingorganised in Geneva, and that a sum of5,000 francs is to be awarded for thelamp which best fulfils the requirementsas regards safety, and technical andeconomical working. Competitors should apply to the Secre-tariat International du Carbure de Cal-cium, 5 Rue des Geanges, Geneva, forfull particulars. AUTOMATIC LIGHTING OF STREETLAMPS. A Corporation desiivs informationregarding systems of automatic or agents are invited tosend particulars of their apparatus toBox 750, The Illuminating Engineer,32, Victoria Street, London, 274 THE ILLUMINATING ENGINEER (may) HOLDERS AND CANOPIES FOR HALF-WATT LAMPS. The coming of the half-watt lamps hasbrought with it certain problems, such asthe design of Bpecial holders which willsupport the somewhat heavy lamp, whichal the same time allow for ventilationand have a pleasing of the lamp while also providing a sup-port for suitable glassware. This is made-in two forms, one for use in cases in wliich New B ill Goliath Holder ir half-wattlamps. \ .in illustration we may take thenew Goliath holder, which is madeof brass and provided with specialventilating apertures which prevent an]-i\ e beating, fn addition, the generaleffect of the holder makes it adopt elaborate precautions t concealit. Another illustration -how- the newBenjamin porcelain Goliath screw holderfor half-watt lamps. These holders arestated to !»• capable of carrying 16amperes at 100 volts. Another featureto which attention is drawn bj theBenjamin Electric Ltd. is the issuenew Beries of steel reflectors for half-wattlamps which are expected to !•<• eminentlysuitable for factory lighting. Thisreflector is also illustrated. Yet another hahwatt novelty is theHolophane canopy, which is designed tocover up the somewhat unsightly neck
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