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Mayelana Nemikhiqizo Yekhishi Elimangalisayo: Izinto zokwakha uBenjamin Thompson waphawula ekuqaleni kwekhulu le-19 ukuthi izitsha zasekhishini zazivame ukwenziwa ngethusi, ngemizamo ehlukahlukene eyenziwa ukuvimbela ithusi ukuthi lingaphenduli ngokudla (ikakhulukazi okuqukethwe kwalo okune-acidic) emazingeni okushisa asetshenziselwa ukupheka, okuhlanganisa ukuthayela, ukwenza i-enamelling, nokuvanisha. Waphawula ukuthi insimbi yayisetshenziswe njenge […]