乳Chronology

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5809009701120123015401600170018001900 590–899910–969980–11191160–12291290–1539

1

1

1

1

1

4

1

1

1

1

1

2

10 +4

4

1

1

1

2

10 +4

2

15 +9

6

9 +3

12 +6

3

9 +3

2

7 +1

1

1

1

No year recorded 32

+26

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 ↗