ON EVAPORATION AND DISSOCIATION. 
81 
(60.) T = 222‘85° (Methyl salicylate). 
Volume. 
Volume of 
1 gramme. 
Pressure. 
P. V. 
Vapour- 
density. 
Volume. 
Volume of 
1 gramme. 
Pressure. 
P. V. 
Vapour- 
deusity. 
c.cs. 
1-2001 
11627 
11293 
c.cs. 
333-5 
323-7 
313-8 
nuns. 
1231 
1268 
1307 
1477-3 
1476-9 
1476-0 
37-53 
37-55 
37-57 
c.cs. 
1-0905 
1-0587 
c.cs. 
303-1 
294-2 
mms. 
1354 
1393 
1476-6 
1474-8 
37-55 
37-60 
Reduction and Arrangement of Results. 
I. Vapour-pressures .— The vapour-pressures experimentally observed and calculated 
are given in the annexed Table, as well as those calculated by Regnault from his 
observations. 
Temperature. 
Y apou r-pressures. 
Temperature. 
V apour-pressures. 
Observed. 
Calculated. 
Regnault. 
Observed. 
Calculated. 
Regnault. 
O 
-20 
62-99 
68-90 
O 
95 
4326 
4326-69 
4401-81 
-15 
86-00 
85-22 
89-31 
100 
4855 
4859-01 
4953-30 
-10 
112-3 
111-81 
114-72 
105 
5441 
5439-35 
5556-23 
- 5 
144-8 
144-69 
146-08 
110 
6082 
6070-38 
6214-63 
0 
184-9 
184-9 
184-39 
115 
6775 
6754-93 
6933-26 
5 
233-0 
233-52 
230-89 
120 
7513 
7495-73 
7719-20 
10 
290-8 
291-78 
286-83 
125 
8313 
8295-62 
15 
360-0 
360-93 
353-62 
130 
9155 
9157-42 
20 
4398 
442-36 
432-78 
135 
10077 
10084-0 
25 
534-8 
537-51 
525-93 
140 
11051 
11078-2 
30* 
. . 
647-93 
634-80 
145 
12122 
12142-9 
35t 
771-8 
775-25 
761-20 
150 
13262 
13281-0 
40 
921-0 
921-18 
907-04 
155 
14514 
14495-1 
45 
1085-5 
1087-53 
1074-15 
160 
15778 
15788-1 
50 
1276 
1276-11 
1264-83 
165 
17201 
17162-9 
55 
1491 
1488-97 
1481-06 
170 
18671 
18622-2 
60 
1734 
1728-13 
1725-01 
175 
20189 
20168 4 
65 
2004 
1995-71 
1998-87 
180 
21775 
21804-3 
70 
2304 
2293-91 
2304-90 
185 
23623 
23532-4 
75 
2638 
2625-04 
2645-41 
190 
25513 
25355-1 
80 
2974 
2991-40 
3022-79 
192 
26331 
26111-2 
85 
3389 
3395-46 
3439-53 
193 
26800 
26495-0 
90 
3831 
3839-71 
3898-26 
* The results given up to 30°, as observed, were read from the curve mentioned on p. 62. 
t This result was calculated from the boiling-point under atmospheric pressure. The remainder are 
the means of actual observations. 
MDCCCLXXXVII.—A. 
M 
