蘭Chronology

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500580600730830960110012001590168017701800 520–579670–729740–829840–959980–10991230–15891600–16791690–1769

1

2

2

1

1

1

1

1

1

2

1

6

1

1

3

3

4

1

5

1

5

2

2

3

12 +6

2

No year recorded 39

+33

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 ↗