64 Physico-Chemical Propertics of Vegetdble Saps [March, 



TABLES 7-1 I 



Data pertaining to specific electrkal conductwity, and to ratio of electrical con- 



ductivity to depression of the freesing point 



Table 7, Series A 



Table 8, Series B 



Table 9, Series C 



The differences may be regarded, in all cases, as statistically trust- 

 worthy in comparison with their probable errors. 



If we express in terms of percentages, some care in selecting 

 the base is necessary. In these Solutions the unity term of the spe- 

 cific gravity is a constant which is enormously large as compared 

 with the variability in the constants for the saps of the two tissues 

 under investigation. If the difference in the specific gravities be 

 divided by the actual specific gravity of either of the two samples, 

 a ratio not at all comparable with the others to be considered later 

 will be secured. We have, therefore, taken the ratio of the differ- 

 ence X 100 to the variable term, L e., d-l, of the specific gravity. 



