質Chronology

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58060074080090010801100122015401660170018001940 680–739750–799840–899910–10791150–12191230–15391550–16591890–1939

1

1

1

1

1

2

1

2

1

1

1

1

1

3

1

1

1

11 +5

15 +9

1

1

1

5

1

1

1

2

2

30 +24

2

No year recorded 82

+76

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 ↗