This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Extraktor nach Twisselmann. Extraktor nach Twisselmann mit Extraktionshlse Copyright Status Public Domain en The extraction after Twisselmann sv Extraktion efter Twisselmann own original text Selbst gezeichnet Oder Zeichner Siegel chemistry Siegel de PDineligible Original upload log page de ExtraktornachTwisselmann Siegel