584 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
The Alcohols. 
The only two alcohols, which had values of n which were not very far removed 
from 2, coupled with moderately small values of h, and which, therefore, had any 
likelihood of giving a serviceable formula of the type already used, were methyl and 
allyl alcohols. The results for these two alcohols are given below;— 
ft- 
7- 
t. 
1 ) X 10 "’ 
(calc.). 
)/ X 105 
(obs.). 
Diff. X 10-5. 
Metliyl alcohol 
•01G.34 
•0^8.371 
60 
354 
349 
5 
Allyl alcohol . 
•02.5.52 
•O 320902 
90 
430 
407 
- 29 
Methyl alcohol gives a moderately small difference, the values of its coefficients 
being somewhat the same as those of the acids. Allyl alcohol gives a much larger 
difference, and has larger coefficients than methyl alcohol. It is to be noted that in 
botli cases the values of y are large, pointing to large temperature changes at the 
higher temperatures. 
Of the remaining alcohols the values of n or of h, or of both, are so large as to 
preclude any chance of agreement between the results of observation and those given 
by a fornnda with three terms, and nothing would be gained by the use of formulm 
involving such a number of terms as would make the agreement satisfactory. For 
the large values of n and b, given by the alcohols, clearly indicate that with them the 
effect of temperature upon viscosity is in general much more pronounced than in any 
other series. In the following table are given for each alcohol the values for yS and y, 
obtained, as before, from Slotte’s formula. Where several of these formulfe 
have been used only that corresponding to the lowest temperature range is given 
in each case. The range over which the original Slotte’s formula applied is 
indicated in the table. The values are given merely for the purpose of showing- 
how the behaviour of the alcohols differs from that of the other substances. 
