蛇Chronology

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58060083011101230141015901600170018001900 670–829860–11091160–12291290–14091420–1589

1

1

1

1

1

1

2

1

1

1

2

1

1

9 +3

7 +1

11 +5

2

1

4

1

3

2

4

10 +4

4

1

1

1

1

1

1

No year recorded 46

+40

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 ↗