Impahla yokumuncwa kwensimbi ye-magnetite iye yatholwa isikhathi eside. Emiqulu eyisishiyagalolunye ye-Lu's spring ne-Autumn Annals, kunesisho esithi: "uma unomusa ngokwanele ukuheha insimbi, ungaholela kuyo." Ngaleso sikhathi, abantu babiza "magnetism" ngokuthi "umusa". Th...
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