Williams lists this stop with the following description: �A term derived from Slav word for �delicate� (e.g. Czech, jemny); hence a soft flue stop in Silesia (Jauer, 1663, J. Hoferichter) and Austria (St Florian, 1770-4, F. X. Chrismann).� Grove places it in central Europe, and calls it �a soft, narrow-scaled, small-mouthed flute stop�.