Muller nitrometer with stand for Dumas combustion method of organic analysis made by Camlab Ltd. Cambridge, 1951-1960 Muller nitrometer with stand for Dumas combustion method of organic analysis made by Camlab Ltd. Cambridge 1951-1960
Staedel apparatus for the collection of nitrogen, on two stands Staedel's Nitrogen Apparatus, London, C. 1885. circa 1885