篤Chronology

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6107408301110123015901600172018001910 620–739750–829840–11091160–12291290–15891670–17191850–1909

1

1

2

1

3

1

1

1

1

1

5

6

2

2

1

No year recorded 28

+22

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 ↗