THE ELECTRIC CONDUCTIVITY- OF NITRIC ACID. 



391 



at 0, 15, and 30 for temperature coefficients ; these of the first and second order, 

 multiplied by 10* and 10" respectively, are shown in the fifth and sixth columns. 



TABLE VIII. 



In Table IX., the values for K 15 X10 8 for the different concentrations obtained in 

 Cell No. I. represent for each length of acid the mean of two, and in some cases three, 

 four, and six, independent observations ; the values are concordant in the majority of 

 cases to '05 per cent., which is probably within the limit of experimental error ; the 

 values for Cells II. and III. also represent the mean of several experiments. 



In Table X., the values for K X10 8 and ICjoXlO 8 are given for the sake of com- 

 parison of our results with those of other observers. Throughout the conductivity of 

 mercury at is taken as unity, and its specific resistance as 94'07 microhms per 

 1 cub. centim. 



