I April 14, 1916. THE COLLIERY GUARDIAN. 691 (Copyright.) “ Bennis ” Coal Bunker and Automatic Elevator, feeding “Bennis'’' Stoker. Wasted Power & Wasted Labour THE man who used a steam hammer for cracking nuts was wasting power. In these days the folly of wasting power is universally admitted and condemned. As a result there is a large and continuous demand for labour-saving devices of all sorts. WE are manufacturers of complete plant for the auto- matic and expeditious handling of coal and ash, and are prepared to submit, free and under specific guarantees, detailed schemes covering any boiler house plant from the simplest to the most complex. DENNIS” Machine Stokers, Coal Bunkers, Elevators, and Conveyors are in successful operation in Munition Factories and Controlled Establishments ; in all the pro- gressive Electricity Stations, and in the leading industries at home and abroad. Write to-day for particulars of recent installations and see what YOU can save in coal, men, boilers and money. ED. BENNIS & CO. LTD., Little Hulton, Bolton; and 28, Victoria Street, S.W. EDWIN LEWIS & SONS. Original Makers of “Acme” & “Williams” Loose Flanged Joints for Mining Work. TUBES OF ANY SIZE Patent WORKS Patent Iron Tube Works, Monmore Green. Britannia Tube WorKs, Ettingshall. WOLVERHAMPTON. Buyers will note that the joint illustrated is an improvement on the “ Williams ” joint, as it does without the internal ferrule. For Compressed Air, Water, or Steam. ________________ Telegrams—“ Lewis, Wolverhampton.” Telephone—Nos. 15 <5 180 Wolverhampton. LONDON ADDRESS—143, Cannon Street, E.C. LIVERPOOL WAREHOUSE-58, South John St. * I ■ i- .m More Light means Cleaner Coal, Less Roof Accidents, and Freedom from Nystagmus. . . . .. HAILWOOD’S Combustion Tube Lamp is cheaper, more reliable, and has greater candle power than electric lamps. ACKROYD & BEST Ltd., Morley, nr. Leeds.