474 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
Propyl Bromide. CHg.CH.j.CHgBr. 
A quantity of this substance, obtained from Kahlbaum, after standing over phos¬ 
phoric oxide, boiled between 70°’76 and 70°'93. Bar. 754'6 millims. Corrected and 
reduced b.p. = 7l°’07. 
Vapour density : 
Found, G079. Calculated, 6138. 
Observations for viscosity :— 
Left limb. 
Right limb. 
Temp. 
Press. 
Corr. 
Temp. 
Press. 
Corr. 
V- 
0 
0-46 
100-50 
-000059 
•006408 
0 
0-43 
100-41 
•000059 
•006419 
7-85 
100-43 
-000064 
•005878 
7-87 
100-31 
•000064 
•005890 
1.3-67 
100-.39 
-000068 
•005513 
13-65 
100-27 
•000067 
•005534 
19-19 
100-30 
-000071 
■005199 
19-15 
100-19 
•000071 
•005219 
25-46 
100-21 
•000075 
•004896 
25-43 
100-07 
•000075 
•004910 
31-90 
100-19 
•000079 
•004580 
31-87 
100-07 
•000079 
■004595 
38-62 
100-14 
•000083 
■004294 
38-59 
100-01 
■000083 
•004307 
45-66 
100-12 
•000088 
•004027 
45-65 
99-99 
•000088 
•004036 
51-11 
100-30 
•000092 
•003835 
50-91 
100-16 
•000091 
•003852 
57-34 
100-31 
•000096 
•003629 ! 
57-41 
100-17 
•000096 
•003638 
61 99 
100 41 
•000099 
•003491 : 
61-98 
100-25 
•000099 
•003499 
67-84 
100-43 
•000103 
-003324 
67-88 
100-28 
•000103 
•003333 
In reducing the observations the value 1'3835 for the relative density at 0°, and 
the expression 
V = 1 + - 0312239 ^ + -0656696^2 + -071369^3 
for the thermal expansion (Zander, ‘ Annalen,’ 214, 159), have been adopted. 
Taking 
77 ^ =-006414 773 = -003328 
77 ^ (calculated) = -004620 
p = 0°-45 
^3 = 67°-86 
ifj (from curve) = 31°-14, 
we obtain the formula 
65-713 
~ (155-75 -t- ’ 
which gives results in good agreement with the observed values. 
