The galvanometer is of the Deprez-d'Arsonval type and is extremely
sensitive. The sensitiveness is so great that it is desirable to
introduce a resistance of some 500 ohms into the thermal-junction
circuits. This is indicated at the top of the diagram near the
galvanometer. The maximum sensitiveness of the galvanometer is retained
when the connection is made with the Wheatstone bridges. The
galvanometer is suspended from the ceiling of the calorimeter laboratory
and is free from vibration.