双Chronology

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500610710810900108011001540160018001870 510–609620–709750–809820–899910–10791160–15391690–17991820–1869

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No year recorded 36

+30

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗