Respiroscope, Simple

This compact unit is designed for comparing the rates of gas absorption or evolution during respiration in small organisms. It includes two stoppered boiling tubes connected by three-way taps at both ends of a manometer. One tube holds the organisms and features a syringe for adjusting the liquid level, while the second tube serves as a control thermo-barometer. This setup enables
accurate measurement and comparison of gas exchange rates in laboratory experiments.