洋Chronology

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6108301150172017801800 620–829840–11491160–17191730–1779

1

1

2

6

1

12 +6

1

1

5

11 +5

42 +36

33 +27

2

No year recorded 48

+42

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 ↗