480 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
1 
Mean temp. 
Difference. 
Observed (mean). 
Calculated. 
' 0 
' 9-49 
•02053 
•020.53 
•00000 
20-63 
-01608 
-01699 
+ -00001 
31-21 
-01445 
•01447 
+ -00002 
41-64 
-012.52 
•01252 
•00000 
i .51-81 
-01099 
•01100 
4 -00001 
62-87 
-00967 
•00966 
- -00001 
73-48 
-00862 
•00861 
- -00001 
85-97 
-00762 
•00759 
- -00003 
9.5-81 
-00694 
•00691 
- -00003 
10.5-71 
•00634 
•00633 
- -00001 
117-01 
•00577 
•0057.5 
- -00002 
126-71 
-0(1.532 
•0053-2 
•00000 
Propylene Bromide. CHg.CH Br.CHoBr. 
Prepared by Kahlbaum. After drjdng over phosphoric oxide the liquid boiled 
between 140°'90 and 141°'17. Bar. 753'9 inillims. Corrected and reduced b.p. = 141°'35, 
Vapour density : 
Found 100'7. Calculated 100‘76. 
Observations for viscosity 
Left limb. 
Rig 
it limb. 
1 
i 
1 Temp. 
Pres.s. 
Corr. 
(/. Temp. 
Pre.s.s. 
Corr. 
0 
0-37 
129-56 
•000031 
0 
•022838 !! 0-35 
129-39 
•000031 
•022856 
12-91 
130-46 
•000040 
•018147 ' 12-91 
130-24 
•000040 
•018166 
25-27 
130-44 
•000046 
•014937 ' 25-27 
130-23 
•000046 
•014937 
38-00 
130-47 
•000054 
•01-2472 1 38-04 
130-27 
•000054 
•012469 
5018 
130-00 
-000062 
•010703 t 49-99 
129-79 
•000062 
•010732 
63-20 
130-12 
•000072 
•009185 ' 63-19 
129-89 
•000072 
•009183 
76-47 
130-06 
•000081 
•007974 76-45 
129-90 
•000081 
•007966 
89-46 
130-10 
•000090 
•007046 1 88-80 
129-89 
•000090 
•007044 
101-16 
130-13 
•OOOlOft 
-006-287 1' 101-20 
129-96 
•000100 
•006281 
113-61 
130-15 
■000109 
•005636 113-81 
129-99 
•000109 
•005624 
127-97 
130-12 
•000121 
•00.5010 127-98 
129-92 
•000121 
•005010 
136-62 
130-08 
•000127 
•004687 II 136-72 
1-29-92 
•000127 
•004681 
In reducing the observations, the value 1'9617 for the relative density at 0°, and 
the expression 
V = 1 + -0391672^ + - 0512277 ^^ + •0sl2010^3 
for the thermal expansion (Zander, ‘ Annalen,’ 214, 175), were adopted. 
