August, 2017: the sun is shining on the edge of North America, but the foghorn still cries its warning to the clouded sea. Two paired blasts per 60 seconds; a signature to identify location by sound. In the dark, you need to know which horn you’ve heard.
This is Cape Race lighthouse, which holds one of the last remaining hyper-radial Fresnel lenses ever made. Perched on the southern coast of Newfoundland, it offers the first sighting of land for ships crossing the Atlantic. Oh, and it’s got nearly 800 pounds of liquid mercury at the top.Continue reading “Mercury in the Bath”