128 



A RESPIRATION CALORIMETER. 



as much as possible from the necessity of manipulating and readjusting 

 the apparatus every few minutes, it should be as nearly automatic as 

 practicable. The means of providing for alternate filling and emptying 

 of the cans automatically is illustrated in figure 35. 



"IT 



FIG. 35. The Water-Meter. Diagrammatic sections showing front and side views. The two 

 upper cans A and B deliver the water into the lower cans C and D by the movement of valves 

 between these two cans. The bulk of the weight is taken up by the lead counterpoise at right 

 of beam E. 



Just below the spring dials a small cup-shaped attachment (water- 

 receiving chamber), with curved tubes from the bottom on each side 

 and a partition in the middle, is attached to the framework. The 

 current of water to be measured enters through a piece of brass pipe, 



