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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N10015
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1
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xlink:href
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X03/01/102.jpg
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<
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head
">
<
s
id
="
N110F9
"> 第三款 重之廣大,無過地球。</
s
>
<
s
id
="
N110FC
">其面與其心,相
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距一萬餘里。</
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N11101
"/>
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<
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main
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<
s
id
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N11106
"> 每圓界三百六十度,所以地球圓界
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亦有三百六十度。</
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>
<
s
id
="
N1110B
">每度有二百五十
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lb
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里,所以相乘得九萬里。</
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>
<
s
id
="
N11110
">因圓界a i
<
lb
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o u 有九萬里,所以a至i徑,用二
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lb
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十二與七比例,得二萬八千六百三
<
lb
/>
十三里。</
s
>
<
s
id
="
N11119
">自a至e,半之,得一萬四千
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lb
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三百十六里餘。</
s
>
<
s
id
="
N1111E
">故云:地球之面與其
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</
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