Small square component in beige plastic casing, labelled with maker's mark 'Pulmo Analysor Godart, Utrecht Holland.' The top side displays switches to mains, pump, turning knobs for current and zero correction and two gauges of voltage and amperes. On the side there are four glass test tubes attached to the main unit, two containing Sodalime and two containing Ca Cl2, calcium chloride. Godart Pulmo Analysor 1955-1970