542 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
The time of flow of this alcohol at low temperatures is so great—at 0"'40 it was 
over 106 minutes—that only single observations were taken up to il2°‘78. 
In reducing the observations we employed Perkin’s value, d(15°/15°) = 0'81495, 
for the relative density, which gives d (0°/4°) = ‘8330, and for the thermal expansion 
the expression 
V = 1 + 0389023 ^ + -05114376^2 + •07l0170^3 
(Thorpe and Jones, loc. cit). 
Three formulse are required to reproduce the values with suflScient accuracy. The 
first extends from 0° to 35°, the second from 35° to 73°, the third from 73° to 124°. 
They are respectively as follows :— 
66652700-0 97413-3 ITT 71-8436 
■ ~ (101-51 + ^k-3736 ’ ~ (64-67 -f It — ^^.ggg ^^0.0050 • 
The agreement between the observed and calculated values is seen in the following 
tables :— 
Mean temp. 
>h 
Difference. 
Observed (mean). 
Calculated. 
0 
0-40 
•109672 
•109811 
+ -000139 
11-G3 
•069581 
•069517 
- -000064 
23-30 
•045372 
•045253 
- -000119 
34-75 
•030788 
•030788 
-000000 
47-40 
•020880 
•020850 
- -000030 
56-94 
•015956 
•015983 
+ -000027 
67-52 
•012183 
-012183 
-000000 
79-25 
•009254 
•009264 
+ -000010 
91-88 
•007075 
•007061 
- -000014 
100-03 
•006033 
•006032 
- -000001 
112-78 
•004819 
•004821 
+ -000002 
124-36 
•004008 
•001012 
+ -000004 
Amyl Alcohol (optically inactive). (CH 3 )oCH.CH 2 .CH 30 H. 
Two samples of optically inactive amyl alcohol have served for our observations. 
For the first we are indebted to Dr. Perkin. It was a portion of that prepared by 
Professor Pedler by Pasteur’s method of fractional crystallisation from the various 
sLilphamylates (‘ Chem. Soc. Trans.,’ vol. 6, p. 74,1868). When tested in a Laurent’s 
polarimeter with monochromatic sodium light it was found to be quite inactive. 
It was placed over anhydrous cojiper sulphate for three weeks, and distilled. It 
boiled between 131°-15 and 131°-35. Bar. 759-4 millims. Corrected and reduced 
b.p. 131°-29. 
