情Chronology

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6107008109001000108011001200141015401600170018001900 620–699750–809910–9991010–10791290–14091420–1539

1

1

1

1

1

2

1

1

2

1

3

2

1

2

3

1

1

2

1

1

1

1

7 +1

1

1

1

2

51 +45

5

4

1

9 +3

3

3

9 +3

2

4

23 +17

4

2

9 +3

6

1

3

1

15 +9

1

No year recorded 253

+247

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 ↗