THE ELECTRIC CONDUCTIVITY OF NITRIC ACID. 



393 



TABLE X. 



From the data given in Table VIII., it is evident that the specific resistance of 

 nitric acid decreases for percentage concentrations from 1'3 to 30, at first more, then 

 less rapidly ; from this point the resistance increases slowly up to 76 per cent., 

 thence more rapidly, until a maximum is reached at 9G'12 per cent., when a sudden 

 reversal takes place. 



KOHLRAUSCH (vide supra), by interpolation of his results, gives the points of 

 maximum conductivity at 29 per cent, at 0, 297 per cent, at 18, and 30'2 per cent, 

 at 40, data which are in general accordance with our results, though it is evident 

 that the exact minimum point could only be ascertained to within one-tenth per cent., 

 by a number of experimental determinations made on either side of the point in 

 question, whereas KOHLRAUSCH gives data only for 23, 30'95, and 37'36 per cent., 

 respectively. 



As the reversal between 96'12 and 98'5 was wholly unexpected, and at first sight 

 appeared anomalous, the determinations were continued within small percentage 

 limits, and the results thereby confirmed. 



VOL. cxci. A. 3 E 



