118 



TRANSMISSIVITY IN PASSIVE IRON WIRES 



It will be observed that complete recovery occupies about 4 minutes 

 in this solution ; in three series (four wires) transmission was complete 

 after 3f minutes; twelve series (eighteen wires) required 4 minutes, 

 and two 4| minutes. The average distance of transmission at the 



TABLE I. 

 Concentration of HNOz, 65 Volumes Per Cent. Temperature 20-2 1°C. 



end of each interval is given at the foot of the column. The incre- 

 ment (per unit of time) of transmissivity during the whole recovery 

 period of 4 minutes is at first gradual and more rapid later. The 

 transition from a limited to an unlimited transmissivity occupies 

 a comparatively short interval toward the end of the period. This 



