BETWEEN THE VISCOSITY OF LIQUIDS AND THEIB CHEMICAL NATURE. 491 
Mean temp. 
Difference. 
Observed (mean). 
Calculated. 
0 
0-31 
-011211 
•011211 
•000000 
7-23 
•010021 
•010041 
+ -000020 
14-73 
•008961 
•008978 
+ -000017 
21-84 
•008129 
•008128 
- -000001 
28-78 
•007417 
•007416 
- -000001 
36-88 
•006695 
•006704 
+ -000009 
43-89 
•006166 
•006171 
+ -000005 
51-74 
•005668 
•005652 
- -000016 
58-53 
•005239 
•005256 
+ -000017 
65-53 
•004912 
•004893 
- -000019 
72-95 
•004558 
•004550 
- -000008 
81-07 
•004217 
•004217 
• 
•000000 
Ethylidene Chloride. CH3.CHCI0. 
A sample, prepared from paraldehyde aud free from phosphorus, was fractionated, 
and the portion boiling between 56°‘84 and 57°’24 was employed for the experiments. 
Bar. 753 '0 millims. Corrected and reduced b.p. = 57°‘32. 
Vapour density : 
Found, 49'38. Calculated, 49'37. 
Observations for viscosity :— 
Left limb. 
Temp. • 
Press. 
0 
0 
hj 
7- 
0 
7-06 
128-11 
-000073 
•005682 
11-34 
127-97 
•000077 
-005400 
15-.34 
128-25 
•000080 
•005153 
19-31 
1-28-25 
•000083 
•004933 
23-24 
128-15 
•000086 
•004730 
27-84 
128-11 
•000089 
•004503 
31-51 
128-02 
•000092 
•004338 
35-57 
128-00 
•000095 
•004156 
40-21 
127-82 
•000099 
•003973 
43-74 
128-4L 
•000102 
•003834 
47-96 
128-15 
•000105 
•003694 
54-54 
127-94 
•000110 
•003476 
Right limb. 
Temp. 
Press. 
Corr. 
'/■ 
0 
7-06 
128-11 
•000073 
•005090 
11-14 
127-94 
•000077 
•005426 
15-34 
128-22 
•0GCO80 
■005160 
19-31 
128-14 
•000083 
•004934 
23-21 
128-87 
•000086 
•004742 
27-86 
128-02 
•000090 
•004510 
31 -59 
127-97 
•000092 
•004337 
35-66 
127-88 
■000096 
•004165 
40-16 
127-75 
•000099 
•003980 
43-74 
128-35 
•000102 
•003838 
47-94 
128-06 
•000105 
•003696 
54-54 
127-86 
•000110 
•003476 
In reducing- the observations the value 1*2049 for the density at 0°, and the 
expression 
3 R 2 
