158 Vucotity of Liquids and their Chemical \,>tnre. [Feb. 22, 



The large effects which can be attributed to the ring-grouping of 

 atoms, to the iso-linkage, to double-linkage, and to changes in the 

 condition of oxygen in its compounds, as well as the smaller effects 

 due to the accumulation of atoms of halogen in a molecule, render 

 evident the quantitative influence of constitution. 



2. Of the remaining substances the chlormethanes, tetrachlor- 

 ethylene, ethylidene chloride and carbon bisulphide give deviations 

 from the calculated values on account of constitutive influences not 

 allowed for in obtaining the fundamental constants. 



8. The alcohols and water exhibit no agreement with the calculated 

 values. The mode in which deviations vary indicates, in the case of 

 the alcohols, that the disturbing factor is related to their chemical 

 nature. 



The results obtained from the consideration of molecular viscosit 

 work at equal slope, are of precisely the same nature as those 

 cussed under molecular viscosity. 



The fundamental constants are as follows : 



Fundamental Viscosity Constants (molecular viscosity work at 

 Slope 0'0 4 323, in ergs X 10 3 ). 



The substances which give deviations from the calculated value 

 fall into two classes. In the first the deviations are to be attribut 

 to chemical constitution, inasmuch as similar disturbing effects maj 

 be detected in the magnitudes of other physical properties which affor 

 no evidence of being influenced by molecular complexity. 



In the second are substances like the acids, water, and the alcohol 

 for which the disturbing factor is, no doubt, molecular complexity. 



The question of the generality of the results obtained is next 

 cussed. It is evident : 



