522 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
we obtain the formula 
_ 8-8415 
~ (83-92 + ’ 
which gives results in close agreement with the observed values. 
Mean temp. 
'/• 
Difference. 
Ob.served (mean). 
Calculated. 
7-67 
-007890 
-007899 
+ -000009 
13-46 
-007172 
-007178 
+ -000006 
19-39 
-006544 
-006.546 
+ -000002 
25-96 
-005946 
-005945 
- -000001 
32-07 
-005470 
-005464 
- -000006 
38-47 
-005021 
-005025 
+ -000004 
45-35 
-004615 
-004614 
- -000001 
51-66 
-004285 
-004284 
- -000001 
57-37 
-004017 
•004017 
•000000 
63-29 
-003767 
•003768 
+ -000001 
69-41 
-003535 
•003536 
+ -000001 
75-36 
-003329 
•003332 
+ -000003 
Toluene (Methyl benzene). CgHg.CHg. 
We are indebted to Dr. Perkin for the sample of this hydrocarbon which has 
served for our experiments. It was prepared from pure sodium parasulphonate. 
Placed over sodium wire and distilled, it boiled between 1]0°'37 and llO'^'IO. 
Bar. 756-6 millims. Corrected and reduced b.p. = 110°'56. 
Determinations of its vapour density gave :— 
Found, I. 46-67 ; II. 46*44. Calculated, 46-00. 
The observations with the glischrometer gave ;— 
Left limb. 
Rigbt limb. 
Temp. 
Press. 
Corr. 
>h 
Temp. 
Press. 
Corr. 
0 
0-27 
104-23 
•000034 
•007648 
O 
0-25 
104-14 
-000034 
•007663 
9-89 
104-21 
•000039 
•006675 
9-88 
104-10 
•000039 
•006691 
19-52 
104-18 
•000043 
•005893 
19-42 
104-11 
•000043 
•005906 
30-28 
104-21 
•000049 
•005183 
30-22 
104-10 
•000049 
•005186 
.39-88 
104-24 
•000053 
•004666 
39-84 
104-13 
•000053 
•004669 
49-43 
104-29 
•000061 
•004218 
49-44 
104-18 
•000061 
-004219 
60-17 
104-32 
•000064 
•003797 
60-20 
104-23 
•000064 
•003801 
69-13 
104-35 
•000068 
•003501 
69-14 
104-28 
•000068 
•003505 
80-62 
103-19 
•000074 
•003162 
80-57 
103-14 
•000074 
•003165 
91-72 
103-17 
•000079 
•002880 
91-76 
103-07 
•000079 
•002875 
09-92 
103-07 
•000083 
•002695 
99-99 
102-99 
•000084 
•002694 
107-06 
102-93 
•000087 
•002554 
107-10 
102-87 
•000087 
•002554 
