598 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
Amyl Alcohols. 
'/• 
Difference. 
Inactive amyl alcohol. 
378 
-4 
Active amyl alcohol. 
374 
44 
Dimethyl ethyl carbiiiol .... 
418 
Oil comparing the coefficients of the isomeric alcohols they seem to vary in a regular 
way with the constitution. The more branched the chain of atoms in the molecule 
the higher is the viscosity. A tertiary alcohol has a larger coefficient than an iso- 
alcohol, and an iso alcohol than a normal alcohol. Active and inactive amyl alcohols 
have almost the same coefficients at their boiling-points. 
If tlie above relations are affected by complexity, it is evident that the extent of 
the complexity is dependent on the chemical nature of the substances. 
Allyl Alcohol and Acetone. 
'/• 
Difference. 
Allyl alcohol. 
373 
-141 
Acetone. 
232 
Allyl alcohol has a value which is more than half as large again as that of acetone, 
and, as is shown in the preceding table, butyl alcohol a value which is more than twice 
as large as that of ethylfether. These results are, no doubt, affected both by diffe¬ 
rences in chemical constitution and of molecular complexity. 
Dichlorethanes. 
'/• 
Difference. 
Ethylene chloride. 
Ethylidene chloride. 
410 
338 
-72 
