4 ART. 5. — T. HIRATA : ON THE VISCOSITY 



the constant A and the specific viscosities z (the viscosity of 

 ethyl alcohol at 25°C. being unity) of the substances dissolved 

 and the upper limits of concentrations expressed in vol. ?^, below 

 which the calculation from (2) gives differences less than one 

 per cent from the direct observations. 



Dissolved substance. 



Acetone 



Ethyl ether ... . 



Ethyl acetate 



Carbon bisulphide 



Ethyl bromide 



Ethyl iodide 



Methyl alcohol 



Benzene 



Chiorobenzene 



Nitrobenzene 



Ethyl benzoate 



Propyl alcohol 



Aniline 



Amyl alcohol 



Glycerine 



In the above table the dissolved substances are arranged 

 according to their constants A. We see from the table that, in 

 general, the substances of greater viscosity give greater constants 

 and we can not find the remarkable fact that Arrhenius observed 

 in aqueous solutions, viz., that the constant A of glycerine is 

 less than that of ether. 



We further noticed, when compared with aqueous solutions 

 at 2o°C., that while in the aqueous solutions the constants A 

 of all non-electrolytes are greater than unity, many of the con- 

 stants found in the alcoholic solutions are less tlian unity. 



