between the viscositt of liquids and their chemical nature. 467 
Mean temp. 
>]■ 
Difference. 
Observed (mean). 
Calculated. 
O 
0-28 
-007167 
-007167 
•000000 
7-70 
-006605 
-Q06613 
+ -000008 
LS-I8 
-006-235 
-006245 
+ -ooooio 
20-80 
-005782 
-005785 
+ -000003 
26-09 
-00.5496 
-005497 
+ -000001 
32-98 
-005151 
-005152 
+ -000001 
38-74 
•004891 
•004890 
- -000001 : 
4.5-24 
-004621 
■004619 
- -000002 1 
5I-.39 
-004387 
•004383 
- -000004 1 
57-51 
-004168 
•004167 
- -000001 i 
63-72 
-003966 
•003964 
- -000002 i 
69-38 
-003792 
•003792 
•000000 
Propyl Iodide. CHg.CHg.CHgl, 
A quantity of this liquid, obtained from Kahlbaum, after drying over phosphoric 
oxide, was carefully fractionated, and the greater portion was eventually found to 
boil between 102°’34 and 102°‘44. Bar. 756'5 millims. Corrected and reduced 
b.p. = 102°-23. 
Vapour density : 
Found, 84’17. Calculated, 84’77. 
The liquid remained quite colourless during the observations for viscosity. These 
gave:— 
Left limb. 
Right limb. 
Temp. 
Press. 
Corr. 
Temp. 
Pi’ess. 
Corr. 
! 
0-31 
101-17 
•000055 
•009327 
o 
0-30 
100-99 
•000055 
•009345 
: 10-95 
101-17 
•000062 
•008165 
11-01 
100-99 
•000062 
•008173 
20-82 
101-17 
•000068 
•007294 
20-80 
101-01 
•O00068 
■007306 
28-33 
101-19 
•000073 
•006728 
28-30 
101-01 
•000073 
•006738 
i 38-83 
101-15 
•000081 
•006044 
38-83 
101-01 
■000081 
•006054 
! 46-16 
100-75 
•000085 
•005631 
46-18 
100-62 
•000085 
■005639 
55-59 
100-82 
•000092 
•005159 
55-60 
100-64 
•000092 
•005166 
1 65-45 
100-93 
•000099 
•004739 
65-48 
100-73 
■000099 
•004742 
74-39 
101-00 
•000105 
•004390 
74-37 
100-81 
•000105 
•004396 
i 83-86 
101-11 
•000112 
•004065 
84-01 
100-90 
•000112 
•004066 
! 90-78 
101-32 
•000118 
•00.3842 
90-79 
101-13 
•000118 
•00.3847 
: 98-87 
101-38 
•000123 
•003626 
98-92 
101-18 
•000123 
•00.3616 
3 o 2 
