The photo at the left shows the lamp, lens, mercury bath bearing, and winding apparatus which was installed on the Pachena Point lighthouse in February 1908. The lens is a 1st order Fresnel lens made by Chance Brothers of Birmingham England – one of the largest sizes possible, and it all sits on a wooden tower!
The glass lens, 3 m tall, 2.5 m wide and weighing 400 kg was brought by boat around Cape Horn. The 1000-watt bulb in use now puts out four million candlepower and is visible from Washington State’s Olympic Peninsula. (reference)
This graphic was sent to me by a friend but I have no idea of the source. I have searched Google and the only mention of the photo that I found was in reference to the Eddystone lighthouse, which this definitely is not. Continue reading