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| Interior Mr. Turner's Brass Works from R. R. Angerstein's Illustrated Travel Diary, 1753-1755. |
Reinhold Rücker Angerstein was a Swedish metallurgist from a family of iron masters, who extensively travelled Britain's industrial works in the early 1750s, including many in Birmingham and nearby. In 1754 he visited Turner's brass works in Birmingham:
The brass-works [...] belongs to Mr Turner and consists of nine furnaces with three built together in each of three separate buildings. The furnaces are heated with mineral coal, of which 15 tons is used for each furnace, and melting lasting ten hours. Each furnace holds nine pots, 14 inches high and nine inches diameter at the top. Each pot is charged with 41 pounds of copper and 50 pounds of calamine. Mixed with [char]coal. During charging I observed that a handful of coal and calamine was first placed on the bottom of the pot, then came the mixture, which was packed in tightly, followed by about a pound of copper in small pieces, and finally again coal and calamine without copper, covering the top. This procedure was said to lengthen the life of the pot both at the top and the bottom. [...] There are six workers for the nine furnaces and casting takes place twice every 24 hours.*1*
