Five-bulbed apparatus, invented by Liebig. This apparatus was filled with a solution of caustic potash and used to collect carbon dioxide after burning a weighed sample to determine the percentage of carbon. Over the years it became the insignia of Liebig's students. From H. von Fehling, Neues Handworterbuch der Chemie(Braunschweig, 1875), p. 468
the Institute Collections.