A complete unit for comprising rates of absorption or evolution of gases by small
organisms, during respiration. The apparatus consists of two stoppered boiling tubes connected by three way taps to
either
limb of a graduated manometer. One tube holds the organisms and has a syringe for altering the level of liquid
in the
manometer during setting up. The other tube acts as a control thermo-barometer. CO2 given off by the respiring
organism is
absorbed by potassium hydroxide in the experimental chamber resulting in a change in the level of liquid
in the manometer
tube. Complete with wire baskets for supporting organisms.
