Greetings, fellow dialists,Attached is a picture of the dial on a lighthouse in North Shields, England (55N 1.5W). It is probably from the eighteenth century and is badly eroded. As well as its hour marks it has a series of vertical azimuth lines labelled with the points of the compass. These may lie between the solstice curves. I am at a loss as to how the lines would have worked. There is no sign of a nodus on the gnomon (which looks old). Possibly, if there was a date scale associated with the azimuth lines, now eroded away, then it would be possible to get the sun's bearing from where the time line crosses the azimuth line but that looks pretty cumbersome. Any suggestions?
Frank 55N 1W
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