溝Chronology

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61074080090010001110154016601780180018701900 620–739750–799840–899910–9991010–11091160–15391600–16591690–17791820–1869

3

1

2

2

1

1

1

1

2

1

1

1

3

1

1

2

2

1

3

1

No year recorded 27

+21

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 ↗