Simple, Automatic, Continuous‐Recording Respirometer

摘要: A new type of respirometer is described. The method involves a ``diver'' which composed rigid respiratory chamber containing CO2 absorbent and an O2‐containing collapsible sack feeding O2 into the by way capillary tube. As used organism in chamber, replacement arrives from thereby decreasing buoyancy system. change recorded on kymograph drum ink‐recording spring scale. has been put practice using 50 ml Soxhlet distilling flasks with rubber stoppers penetrated 27‐gauge hypodermic needles as sections Saran tubing (Visking Corporation Chicago) capacity 40–50 attached to stopper sacks. Recording scales variable ranges 2 20 g have served satisfactorily for measuring natural variations rates consumption certain small animals are