The Tiangong Kaiwu contains a lot of ancient Chinese physical knowledge, such as mechanics, thermodynamics, etc., in water-lifting tools, ship rudders, steel pouring, clay-molding cauldrons, lost wax casting, methods for removing coal mine gas, brine absorbers in salt wells, melting, extraction methods, etc. In the chapter "Hardware", it is clearly pointed out that zinc is a new metal, and its smelting method is recorded for the first time. 0 reply
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