BETWEEN THE VISCOSITY OE LIQUIDS AND THEIR CHEMICAL NATURE. 649 
cent. For this reason it was assumed that the fundamental constants which were 
employed at slope ’04323, if increased in the ratio of 1 : 1’928, would serve for the 
calculation of molecular viscosities at slope ’O^OST. This was the only course which 
could be taken in order to deduce fundamental constants, as the number of liquids 
was too small to enable them to be obtained in the manner already indicated. 
Fundamental constants had to be deduced in order that alcohols might be compared 
with the other liquids. The following are the values of the atomic constants at slope 
'O 4987 calculated from the values at slope *04,323, on the assumption that molecular 
viscosity at the larger slope is 1’928 times that at the smaller. 
Fundamental Viscosity Constants (Molecular Viscosity at Slope 'O 4987 ). 
Hydrogen.• . . 
H 
86 
Carbon . 
C 
\ / 
60 
HydroxyJ-oxygen.C— U —H 
0 
320 
Ether-oxygen.C—0—C 
o< 
112 
Carbonyl-oxygen.C=0 
II 
0 
\/ 
B82 
Sulphur.C—S—C 
s 
474 
Chloi’ine (in monochlorides). 
Cl • 
494 
Chlorine (in dichlorides). 
Cl' 
470 
Bromine (in monobromides). 
Br 
717 
Bromine (in dibromides). 
Br' 
696 
Iodine. 
I 
962 
Iso grouping. 
< 
-40 
Double linkage. 
(=) 
92 
Ring-grouping. 
® 
465 
The following table gives the comparison of the observed values with those 
calculated from the above fundamental constants :— 
4 o 
MDCCCXCIV.—A. 
