譬Chronology

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50058060067070080096010001080110012201650178018001900 520–579620–669750–799860–9591010–10791160–12191230–16491690–1779

1

2

4

5

5

1

1

3

1

2

1

1

1

1

1

1

1

1

4

1

2

1

6

2

1

8 +2

5

2

1

1

No year recorded 13

+7

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 ↗