BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE. 483 
Left limb. 
- 
Right limb. 
Temp. 
Press. 
Corr. 
V- 
Temp. 
Press. 
Corr. 
0 
0-84 
128-99 
-000070 
-012163 
o 
0-88 
128-73 
■000070 
•012171 
11-02 
129-07 
-000078 
-010693 
10-88 
128-76 
•000078 
•010701 
19-94 
129-07 
-000086 
-009592 
19-93 
128-84 
•000086 
■009603 
30-15 
129-17 
-000096 
-008579 
30-13 
128-93 
•000096 
•008594 
.39-45 
129-22 
-000104 
■007812 
39-53 
128-96 
■000104 
•007820 
47-80 
129-19 
-000111 
■007222 
47-81 
128-99 
•000111 
•0072-24 
58-00 
129-25 
-0001-20 
■006588 
57-92 
129-00 
•000120 
•006595 
67-21 
129-26 
-000128 
■006099 
67-17 
1-29-02 
•000128 
•006102 
76-65 
1-29-37 
-000137 
■005651 
76-79 
129-10 
•000136 
•005650 
85-95 
129-37 
-000145 
-005-249 
85-95 
1-29-13 
■000145 
•005256 
97-10 
129-20 
-000155 
■004831 
97-10 
128-99 
•000154 
•004839 
105-74 
129-22 
-000163 
■004538 
105-71 
129-01 
•000162 
•004542 
The published determinations of the density of acetylene bromide are somewhat 
discordant. Two independent estimations of the sample employed by us gave 
d (0°/4°) = 2'29866 and 2'29847 ; mean = 2‘2986, which we havm adopted in the 
calculations. This agrees closely with Weger’s value, d{0°lQ°) = 2'2983. 
For the thermal expansion we have used Weger’s expression (‘Annalen,’ 221, 72) 
V = 1 + -0399103^ + -0517519^^ + -0811776^3. 
Taking 
= -012167 % = ’004540 (calculated) = -007432 
= 0°-86 ^3 = 105°-72 t .2 (from curve) = 44°-77, 
we obtain the formula 
14-868 
~~ (112-29 + QI-5032 ’ 
which gives the following calculated values :— 
Mean temp. 
V- 
Difference. 
Observed (mean). 
Calculated. 
O 
0-86 
■01217 
■01217 
•00000 
10-95 
•01070 
•01070 
•00000 
19-93 
•00960 
•00963 
+ -00003 
.30-14 
•00859 
•00861 
+ -00002 
39-49 
•00782 
•00782 
•00000 
47-80 
•00722 
-007-22 
•00000 
57-96 
•00659 
-00658 
- -00001 
67-19 
•00610 
■00608 
- -00002 
76-72 
•00565 
•00563 
- -00002 
85-95 
•00525 
•00523 
- -00002 
97-10 
•00483 
•00482 
- -00001 
105-72 
•00454 
•00454 
■00000 
3 Q 2 
