Terentius, Johannes; Zheng, Wang 王徴
,
Yuan xi qi qi tu shuo lu zui 遠西奇器圖說錄最
,
[1830]
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121 - 131
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<
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N11145
"> 第四款 重何物?每體直下,必欲到地心者是。</
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<
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"> 試觀上圖。</
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e、i、u皆重物,各體各欲直下,至地
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心方止。</
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<
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N11159
">蓋重性就下,而地心乃其本
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所故耳。</
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">譬如磁石吸鐵,鐵性就石,不
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論石之在上、在下、在左、在右,而鐵必
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就之者,其性然也。</
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<
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N11165
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就下;一,體有斤兩。</
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