148 
PROFESSORS W. RAMSAY AND S. YOUNG 
At each temperature the propyl alcohol vapour was made to occupy the largest 
possible volume, and was left for several hours until the vapour-pressure of mercury 
had attained its maximum. Pteadings were taken every half hour to ascertain when 
the pressure had become constant. The subsequent readings were taken at diminishing 
volumes. 
Temperature, 
Volume of 1 grm. 
Pressure, 
Yapour-denr^ity. j 
O 
c.cs.- 
mms. 
150 
172-8 
-2,359 
32-25 
162-4 
2,497 
32-41 
151-9 
2,657 
3-2-57 
141-4 
-2,838 
3-2-77 
130-8 
3,044 
33-01 
120-2 
3,281 
33-33 
109-5 
3,565 
33-66 
98-5 
3,891 
34-21 
V apour-pressure 
= 4,053 
180 
17-2-9 
2,554 
32-02 
152-0 
2,884 
32-25 
130'9 
3,325 
32-48 
115-0 
3,745 
32-84 
98-8 
4,295 
33-31 
82-6 
5,043 
33-95 
66-3 
6,117 
34-80 
55-4 
7,091 
36-02 
49-9 
7,721 
.36-71 ' 
V apour-pressure 
= 8,365 
20o 
173-0 
2,683 
31-67 
152-1 
3,033 
31-86 
131-0 
3,492 
32-14 
109-7 
4,129 
32-46 
93-5 
4,786 
32-85 
77-2 
5,683 
33-51 
60 9 
7,013 
34-43 t 
1 
49-9 
8,309 
35-44 ! 
44-5 
9,1.36 
.36-20 ‘ 
39-0 
10,129 
37-24 
33-5 
11,362 
38-63 
Vapour-pressure 
= 12,691 
220 
173-1 
2,813 
31-46 
152-2 
3,182 
31-64 1 
131-1 
3,667 
31-88 ; 
109-7 
4,335 
32-20 
93-5 
5,035 
32-53 1 
77-2 
.5,995 
33-09 1 
60-9 
7,435 
33-83 
1 
49-9 
8,8.50 
34-66 
39-0 
10,895 
36-07 
33-5 
12,318 
37-12 
28-0 
14,123 
38-81 
22-4 
16,454 
41-56 
19-6 
17,850 
43-73 
V apour-pressure 
= 18,711 
