144 



Dr. C. H. Lees on the Viscosities of 



Per cent. Sodium Chloride. 



Viscosity. 



Weight. 



Volume. 



Observed. 



Calculated. 



Sodium Chloride Solution at 40° C. n= — *33 (Hosking). 











•00657 



•00657 



5 



2-44 



725 



724 



10 



5-03 



802 



805 



20 



1064 



1025 



1025 



Sodium Chloride Solution at 80° C. w=*25. 











•00360 



•00360 



5 



2-44 



399 



402 



10 



5-03 



455 



451 



20 



1064 



571 



571 



Sugar Solution at 20° C. (Burkhard). w=— -50. 



Per cent 



. Sugar. 



Per. cent of 



30 per cent. 



Solution. 



Viscosity. 



Weight. 



Volume. 



Observed. 



Calculated. 















1-0 



10 



5 



32 



151 



1-15 



114 



10 



65 



306 



1-33 



133 



15 



99 



465 



1-56 



1-56 



20 



135 



63-4 



1-89 



1-89 



25 



172 



80-8 



235 



234 



30 



2P3 



100 



307 



307 



The agreement between the calculated and experimental 

 values in all the above cases is sufficient to justify the use of 

 the empirical formula 



a)-©"-©" 



as, at any rate, a first approximation towards a representation 



