写Chronology

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50061074083096011101590177018001940 510–609680–739750–829840–959970–11091160–15891600–17691860–1939

1

4

1

6

1

1

1

1

1

1

1

1

1

3

2

2

1

No year recorded 47

+41

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 ↗