OF VITAL PHENOMENA 



19 



W 



Fig. 2. 



Electric conductivity electrode of low inductive capacity. 



Before using the cell, it must be cleaned with a saturated solu- 

 tion of potassium bichromate in concentrated sulphuric acid 

 (called cleaning fluid). The platinum should be cleaned by heat 

 before fusing in the glass, and cleaned with cleaning fluid in the 

 cell. The cell is rinsed with distilled water and the platinum is 

 coated with platinum black (platinized) in order to increase its 



£_ 



Fig. 3. Electric conductivity electrode for tissues. 



