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HOME OF THE LADY DENMAN - Local history isn't always about the big story - the everyday story of life in the early development of the region can be a fascinating, entertaining and educational journey.

17 December 2018

Point Perpendicular Lighthouse

1899
May 1909 - JERVIS BAY LIGHT
The Department of Navigation notified that an incandescent Welsbach mantle lamp, using petroleum vapour is now installed in the lighthouse at Point Perpendicular, having. been first displayed on March 17th. The improved light is of approximately 1200 candlepower, while the former oil light was only about 300  (intrinsic candlepower without the effect of the lens). The character of the light remains the same, viz, three short successive 'flashes every 20 minutes but the light will be seen at a greater distance in hazy weather.

Welsbach Lamp.
The Welsbach Lamp was invented by Auer von Welsbach in 1885. The Welsbach mantle was made from silk impregnated with zirconia. It burnt at least three times brighter than what was previously known.


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