Here the mechanical piston-arm attached to Lady Isabella (the Laxey water-wheel) is more plainly visible. When the mines were operating, the wheel’s motion was used to drive the pumps to clear the mines of water.
This aqueduct-like structure doesn’t in fact carry water to (or from) the Laxey water-wheel, but rather supports the arm which the wheel drives, which in turn was used to operate the pumps to clear the nearby mines of water.
Panorama of the Chicago downtown skyline at night, looking across the edge of Lake Michigan. (Four-photo stitch.)
I was out taking these photso for about forty minutes. The temperature was 4ºF (minus 16.6ºC): during the day it had risen to a high of 7ºF (minus 14ºC). Fortunately I had procured some thermal underwear in the afternoon in anticipation of my evening standing on the icy shore of an icy lake.