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Harry Woodward (naturalist) : ウィキペディア英語版 | Harry Woodward (naturalist) Harry Woodward was a US ranger naturalist who, in 1938-9, first described a mathematical relation between the durations and intervals of eruptions from the Old Faithful Geyser. Intervals between eruptions can range from 45 to 125 minutes, averaging 66.5 minutes in 1939,〔(【引用サイトリンク】title=Season Report on the Naturalist Activities at Old Faithful Station. )〕 slowly increasing to an average of 90 minutes apart today. ==References== 〔
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