1) A word commonly used in Yorkshire for ferrous sulphate, also called ‘green copperas’ or ‘green vitriol’.

It was imported in the fifteenth century but produced locally soon afterwards: 1463 1 C lib’ coperose, Hull

1577 Two pounds grene copperas, viijd, Richmond

1616 coporas and galles, Brandsby

1663 12li coperose, 1s, Selby. See NH159-61.

dates 1463 1577 1616 1663

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