{10 AET. 5. — T. HIRATA : ON THE VISCOSITY 



As is seen from the tables, most of the dissolved substances 

 above mentioned are calculable with the formula (2) with dif- 

 ferences less than one per cent up to 25 vol. Yo solutions and 

 a few, i. e. three out of the fifteen, up to 12.5 vol. ¥> solutions. 

 But when water is the dissolved substance the formula does not 

 apply in the same manner unless the concentrations of the solu- 

 tions are less than 3 vol. ¥> as the following tables show: 



Water. 



This is also clear from the shape of the viscosity curve of 

 the water solutions, the dotted line in the figure (Fig. 2) is that 

 calculated from ^ = 1.032. 



