BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE. ()I7 
Aromatic Hydrocarbons. 
>ldK 
Difference. 
Ol'tho-xylene. 
841 
Meta-xylene. 
806 
2 
Para-xylene. 
808 
15 
Ethyl benzene. 
323 
Conclusions in reference to Molecular Viscosity Work at the Boiling-point. 
By means of the numbers given in the preceding tables tlie following probable 
values for fundamental constants are deduced :— 
Fundamental Viscosity Constants (Molecular Viscosity Work at the 
Boiling-point.) 
Hydrogen. 
H 
-1-5 
Carbon . 
C 
50 
\ / 
Hydi’oxyl-oxygen .... 
. C—0—H 
0 
102 
1 Ether-oxygen. 
. C—0-C 
0< 
27 
Carbonyl-oxygen .... 
. C=0 
’ II 
0 
41 
Sulphur. 
. C—S—C 
\s/ 
09 
Chlorine. 
Cl 
109 
Bromine (in monobromide) 
Br 
176 
Bromine (in dibromides) 
Br' 
212 
Iodine. 
I 
233 
Iso grouping. 
< 
5 
Double linkage. 
(-) 
-81 
Ring grouping. 
-60 
In the following tables is given the comparison of tlie observed a,nd calculated 
numbers. 
MDCCCXCIV.—A. 
4 K 
