A virtis grinder is used to grind small pieces of each sample with ethyl alcohol. This makes an extract used in biological and chemical testing. Image courtesy of Islands in the Sea 2002, NOAA/OER.
A virtis grinder is used to grind small pieces of each sample with ethyl alcohol. This makes an extract used in biological and chemical testing. Image courtesy of Islands in the Sea 2002, NOAA/OER.