胎Chronology

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5806006907008009601000111012201650174018001900 620–689820–9591010–11091150–12191230–16491660–17391750–1799

1

1

1

1

1

1

1

1

1

1

1

1

1

2

1

1

1

5

5

2

1

1

1

No year recorded 4

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 ↗