and Two New Types of Viscosity. 



11 



mean values which they give for X and the coefficient Gr/K 

 in (14). The results are collected in the following table, in 

 which X denotes the molecular specific conductivity of 

 N(C 2 H 5 ) 4 I in the solvent named, while rj and K denote the 

 viscosity and dielectric capacity for the solvent taken from 

 the data collected and determined by Walden. Columns are 

 added containing the products \ r) and K(G/K). 



Table I. 

 Solutions of N(C 3 H 5 ) 4 I at 25°. 



Solvent. 



Methyl alcohol 



Ethyl „ 



Glycol 



Furfural 



Benzalclehyde 



Saiicaldehyde 



Anisaldehyde 



Acetic anhydride 



Isobutyric ,, 



Oitraconic ,. 



Acetyl chloride 



Acetyl bromide 



Methyl cyanacetate 



Ethyl „ 



Ethyl nitrate 



Di-ethyl sulphite (symmetric) 

 ,, ,, (asymmetric)... 



Di-methyl sulphate 



Di-ethyl „ 



Formamide 



Acetonitrile 



Propionitrile 



Benzyl cyanide , 



Glycollonitrile 



Eactonitrile 



Methyl thiocyanate 



Ethyl 



Ethyl isothiocyanate 



Nitromethane 



Ni trobenzene 



Nitrosodimethylia (OH 3 ) 2 NNO 



Acetone 



A cetylacetone 



Epichlorhydrin 



Mean (excluding Glycol) ... 



x . 



G-/K. 



100\ ^ . 



K(G/K). 



Vo- 



K. 



138 



25-4 



79 



853 



•0053 33-6 1 



SL-9 



73 



88 



1759 



•0108 24-Oi 



8-(> 



14-7 



144 



507 



■1679 34-5 



51-3 



133 



76 



506 



•0149 38 



483 



57 



68 



895 



014 1.V7 



30 



120 



84 



1670 



0281 13-9 



17 5 



32 



74 



495 



■0422 15-5 1 



82 



37-8 



70 



676 



•0086 17-9' 



48 



73-7 





1000 



13-6 



23-6 



12(5 



80 



4D8 



•0338 39-5 



242 



95 



94 



1470 



•003S7 15-5 



146 



78 





1260 



... .162 



324 



28-6 



81 



822 



•025 28-8 



31 



32 





847 



... 265 



164 



m 



81 



1220 



•00197 



18-5 



123 



216 





3450 





16 



26-7 



7 



64 



270 



•0238 



38-6 



44 



13 



77 



604 



•0176 



46-5 



38 



11 



61 



330 



•0160 



30 



25-5 



4 



82 



336 



•0321 



84 



227 



25-6 



79 



920 



•00346 36 



187 



34 



77 



916 



•00413 27 



-JO 



50 



77 



791 



•0193 



15-8 



73 



36 





244 





67-9J 



40 



13 



86 



490 



•0215 



37-7S 



98 



14 



70 



484 



•00719 34-o 



97 



36-8 



75 



1070 



•00775 29-0, 



i 129 



85 



80 



1550 



•00618, 18-3 



1 127 



16 



79 



628 



00619 39 3 



43 



23 



78 



815 



•0182 I 35-4 



99 



17-7 





944 



... 53-3 



259 



58 



82 



1230 



•00316 21-3 



81 



22 



63 



560 



•0078 i 25-5 



73 



382 



75 



942 



0103 



26-0 



... 



77 



The mean value of \ ?? for 27 out of these 28 substances, 

 when glycol is excluded, is 0*77, the average departure being 

 0*055. It appears then that the values of X which I have 

 found by (14) from Walden's data exceed those estimated 



