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MamechiAdmin: 英語訳を取り込み（pages/translations_en.json）

2026-10-29T10:34:51Z

英語訳を取り込み（pages/translations_en.json）

← 古い版		2026年10月29日 (木) 19:34時点における版
2行目:		2行目:
	{{豆知識		{{豆知識
	\|番号=0013		\|番号=0013
			\|投稿者=まめち編集部
	\|本文=In 1672 a pendulum clock set in Paris was taken to Cayenne in South America, near the equator, and it lost 2 minutes 28 seconds a day.		\|本文=In 1672 a pendulum clock set in Paris was taken to Cayenne in South America, near the equator, and it lost 2 minutes 28 seconds a day.
	\|なぜ=Gravity is weaker at the equator, so the pendulum swings more slowly; Newton cited this as evidence that the Earth bulges at the equator.		\|なぜ=Gravity is weaker at the equator, so the pendulum swings more slowly; Newton cited this as evidence that the Earth bulges at the equator.

MamechiAdmin: 英語訳の「更新が必要」の印を外す（訳は対応表と同じ）

2026-10-29T04:00:38Z

英語訳の「更新が必要」の印を外す（訳は対応表と同じ）

← 古い版		2026年10月29日 (木) 13:00時点における版
2行目:		2行目:
	{{豆知識		{{豆知識
	\|番号=0013		\|番号=0013
	\|本文=~~<span class="mw-translate-fuzzy">~~In 1672 a pendulum clock set in Paris was taken to Cayenne in South America, near the equator, and it lost 2 minutes 28 seconds a day.~~</span>~~		\|本文=In 1672 a pendulum clock set in Paris was taken to Cayenne in South America, near the equator, and it lost 2 minutes 28 seconds a day.
	\|なぜ=Gravity is weaker at the equator, so the pendulum swings more slowly; Newton cited this as evidence that the Earth bulges at the equator.		\|なぜ=Gravity is weaker at the equator, so the pendulum swings more slowly; Newton cited this as evidence that the Earth bulges at the equator.
	\|ジャンル=科学・自然		\|ジャンル=科学・自然

MamechiAdmin: 英語訳を取り込み（pages/translations_en.json）

2026-10-29T03:58:30Z

英語訳を取り込み（pages/translations_en.json）

← 古い版		2026年10月29日 (木) 12:58時点における版
2行目:		2行目:
	{{豆知識		{{豆知識
	\|番号=0013		\|番号=0013
	\|本文=In 1672 a pendulum clock set in Paris was taken to Cayenne in South America, near the equator, and it lost 2 minutes 28 seconds a day. Gravity is weaker at the equator, so the pendulum swings more slowly; Newton cited this as evidence that the Earth bulges at the equator.		\|本文=<span class="mw-translate-fuzzy">In 1672 a pendulum clock set in Paris was taken to Cayenne in South America, near the equator, and it lost 2 minutes 28 seconds a day.</span>
			\|なぜ=Gravity is weaker at the equator, so the pendulum swings more slowly; Newton cited this as evidence that the Earth bulges at the equator.
	\|ジャンル=科学・自然		\|ジャンル=科学・自然
	\|ファクト度=A		\|ファクト度=A

FuzzyBot: 翻訳元ページの新版に適合するように更新

2026-10-29T03:03:46Z

翻訳元ページの新版に適合するように更新

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<languages/>
{{豆知識
|番号=0013
|本文=In 1672 a pendulum clock set in Paris was taken to Cayenne in South America, near the equator, and it lost 2 minutes 28 seconds a day. Gravity is weaker at the equator, so the pendulum swings more slowly; Newton cited this as evidence that the Earth bulges at the equator.
|ジャンル=科学・自然
|ファクト度=A
|ファクト度の根拠=A dictionary of scientific biography and a paper both quote Newton's Principia giving "2 min 28 s a day". Not S because the Principia itself was not checked directly
|ネタ度=S
|ネタ度の根拠=Surprising that a slow clock revealed the shape of the Earth
|便利度=該当なし
|便利度の根拠=A fact worth knowing for its own sake
|検証ステータス=根拠あり
|根拠1URL=https://mathshistory.st-andrews.ac.uk/DSB/Richer.pdf
|根拠1要約=Dictionary of Scientific Biography, entry "Richer". Quotes Principia Book III Proposition 20: in 1672 at Cayenne the clock lost 2 min 28 s a day; gravity is weaker at the equator and the Earth is a spheroid flattened at the poles
|根拠1格付け=二次
|根拠2URL=https://arxiv.org/pdf/2211.11441
|根拠2要約=A paper on the history of gravity measurement (arXiv). Quotes the same passage by Newton (2 min 28 s a day); Paris at 48.86°N, Cayenne at 4.94°N. From normal gravity and the latitude difference alone the loss would be about 2 min 8 s a day (checked by calculation)
|根拠2格付け=二次
|補足="2 min 28 s" is Newton's figure; Richer's own measurement (the pendulum had to be shortened by about 1.25 lignes, about 2.8 mm) implies a loss of about 2 minutes, slightly less. Gravity is weaker at the equator for two reasons: the centrifugal force of the rotation, and the equator being farther from the Earth's centre. The English Wikipedia article "Jean Richer" tells the same story.
|検証日時=2026-10-29
|検証方式=AI＋人
|本家既出チェック=本家に既出
|本家の該当ページ=https://en.wikipedia.org/wiki/Jean_Richer
|派生元=体重計の数字は緯度が高いほど大きく出る
}}