Iron nights

As Iron nights in are (used mostly in the plural) Norway and Sweden , the first frosty nights from about mid-August called, which can destroy a promising harvest and mean the end of the summer.

For example, Knut Hamsun uses the term in his novel Pan at the end of chapter 25.

swell

• General economic or agricultural calendar for the year 1770. Johann Benedict Mezler, Stuttgart.
• Gyldendal's concise dictionary of Norwegian. Langenscheidt, Berlin / Munich / Zurich 1965, under jernnetter .
• Illustrerad Svensk Ordbok, by nature and culture. Stockholm 1970, under järnnatt .