32 



TEMPERATURE FLUCTUATIONS IN THE HUMAN BODY. 



The apparatus is designed to measure temperatures to 0.02 C, and has 

 a range of 8 C. The voltage of the cell B is 1.4 volts; that of N, 1.0197 volts. 



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CALORIMETERS 

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Fig. 7. Complete wiring diagram of modified apparatus. Current from the battery B flows through 

 a portion (PD) of the slide wire CD, then through the resistances V and It, and returns to the 

 battery through the resistance M. The points C and D are connected without sliding 

 contact to the switching arrangement, of which G? connects the galvanometer G in circuit, T 

 replaces the thermal junction system when testing, and 1, 2, and 3 are connected to the thermal 

 junctions in the calorimeters and the constant-temperature oven. The constantan wires are 

 indicated by the heavy lines; the calorimeter thermometers are detachable at the small 

 circles. W is a resistance for adjusting the galvanometer sensitiveness. N is the standard 

 cell, protected by the high resistance O, and connected to the circuit through the double con- 

 tact key Gi. The switch K is for convenience in bringing the galvanometer to rest. 



