Chimney

From International Dictionary of Marine Aids to Navigation
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2-3-065

A glass envelope surrounding the flame of an oil lamp, and having special shape, in order to improve the luminous efficacy and to avoid flickering of the flame.

Ch2 Fig21.jpg





Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM