Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 466
me manner as in old daysin the Siege of Antwerp ; theywaited until the marsh was frozensolid, and then carried the pipes andheavy wooden piles over the ice.This would have taken more timeand cost much more if it had been donein summer. An Indirect Gas Lighting Unit. It will be recalled that some… … Fig. 1.—Four-light indirect gas lighting unit. office of the above Company. Ordinaryupright burners ancl mantles are used,surrounded by silvered glass reflectors.Each burner has its pilot flame, and thewho!e unit is controlled by a chain-pull. The Best Miners Safety Lamp. A coMPETiTiox for the best…
Lighting
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