Well, you learn something new every day. I’ve photographed the tidal reaches of the River Hull on many occasions, often - as here - from the Scale Lane footbridge. Thanks to Google I’m now aware that the building which dominates the scene is Shotwell Tower, built for making lead shot using the drop method. The process was patented in 1782 by Bristol plumber William Watts, who realised that if drops of molten lead fall far enough through the air into water they become spherical: a significant improvement on the shape and quality of lead shot produced by casting…
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