678 
MESSRS. T. E. THORPE AND J. W. ROJ)GER ON THE RELATIONS 
Molecular Viscosity work at Slope 
(rj ill dynes per sq, centini. X specific molecular volume in cub. centims. X 10^.) 
In order to compare the alcohols with the other liquids, and to test if the 
comparisons at slope ‘04323 still held at different values of the slope, the magnitudes 
of the molecular viscosity work were ascertained at slope ’O 4987 . The reason for 
choosing this particular value has already been given. 
On finding values of the ratio 
Molecular viscosity work at slope ‘O^OST 
Molecular viscosity work at slope ‘04323 ’ 
for as many substances as could be compared at the two slopes, numbers which were 
practically the same were obtained; the mean value of the ratio being 1‘880, with 
an average divergence of ‘034, or 1‘8 per cent. 
As the number of liquids was insufficient to admit of an independent determination 
of the fundamental constants, from the constancy of the above ratio it w^as assumed 
that the fundamental constants obtained at slope ‘O 4323 , if multiplied by 1‘88, would 
apply at slope ‘O 4987 ; the values thus obtained are given below. 
Fundamental Viscosity Constants (Molecular Viscosity work at Slope ‘04987). 
Hydrogen. 
H 
— 64 
Carbon. 
C 
\ X 
278 
Hydroxyl-oxyg’en .... 
. C—0—H 
0 
188 
Ether-oxygen. 
. C—0—C 
0 < 
73 
Carbonyl-oxygen .... 
. C --0 
II 
0 
\ / 
- 36 
Suljjliur. 
s 
271 
Cldorine (in monocbloridcs) 
. 
Cl 
167 
Chlorine (in dichlorides) 
cr 
154 
Bromine (in monobromides) 
. 
Br 
284 
Bromine (in dibromides) 
. 
Br' 
278 
Iodine . 
I 
410 
Iso grou 2 )ing. 
< 
- 15 
Double-linkage. 
(=) 
- 179 
Ring-grouping. 
® 
- 694 
The comparison of the observed numbers with those calculated by means of the 
above constants is given in the following table :— 
