654 
PROFESSOR W. RAMSAY AND DR. J. SHIELDS OH THE 
Table III.—Surface-energy of acetic acid and of meth 3 d and ethyl alcohols. 
Acetic acid 
(Crit. temp., 821‘5° C.). 
Methyl alcohol 
(Crit. temjD., 240-0° C.). 
Ethyl alcohol 
(CHt. temp., 243-1° C.). 
o 
o 
T. 
7 (AH)t. 
f C. 
7. 
7 (MiOi 
c c. 
7. 
7 (Mr)t. 
c 
o 
Ergs. 
0 
0 
Ergs. 
0 
o 
Ergs. 
20 
301-5 
371-2 
20 
220 
271-4 
20 
223-1 
331-0 
130 
191-5 
261-5 
70 
170 
216-2 
40 
203-1 
307-3 
]40 
181-5 
2.50-2 
80 
160 
206-6 
60 
183-1 
284-8 
150 
171-5 
238-4 
90 
150 
196-3 
80 
163-1 
261-2 
IGO 
161-5 
226-3 
100 
140 
186-7 
90 
153-1 
247-1 
170 
151-5 
213-9 
110 
130 
176-7 
100 
143-1 
235-0 
180 
141-5 
200-2 
120 
120 
166-3 
110 
133-1 
221-7 
190 
131-5 
187-9 
130 
110 
154-8 
120 
1-23-1 
208-0 
200 
121-5 
174-9 
140 
100 
142-9 
130 
113-1 
193-3 
210 
111-5 
160-5 
150 
90 
131-3 
140 
103-1 
178-8 
220 
101-5 
146-9 
160 
SO 
118-1 
150 
93-1 
163-0 
230 
91-5 
1321 
170 
70 
104-8 
160 
83-1 
147-2 
240 
81-5 
117-5 
180 
60 
91-0 
170 
73-1 
130-1 
250 
71-5 
101-5 
190 
50 
76-1 
180 
63-1 
112-6 
260 
61-5 
86-0 
200 
40 
60-6 
190 
53-1 
94-9 
270 
51-5 
71-6 
210 
30 
45-4 
200 
43-1 
75-7 
280 
41-5 
54-8 
220 
20 
29-2 
210 
33-1 
57-1 
290 
31-5 
39-9 
230 
10 
13-4 
220 
23-1 
39-2 
300 
21-5 
25-1 
234 
6 
7-6 
230 
13-1 
19-8 
310 
11-5 
11-3 
240 
0 
0-0 
234 
9-1 
13-3 
320 
1-5 
0-82 
236 
7-1 
9-9 
321'5 
0-0 
0-0 
240 
3-1 
3-7 
. 
243-1 
0-0 
0-0 
Observations of the rise in a capillary tube were made at — 89°'S with methyl and 
ethyl alcohols in contact with their own vapours only. 
The results were :— 
7 
Methyl alcohol. 361'8 ergs. 
Ethjd alcohol. 436’1 ,, 
These numbers appear to lie concordantly on prolongations of the respective curves 
representing the surface-energy of the alcohols in relation to temperature. (See 
Plate 25.) 
Now it is possible to calculate the amount of association at aiw temperature for 
acetic acid and the alcohols, on the assumption that k is a constant, which is approxi¬ 
mately true for the normal liquids examined, and that if no association occurred with 
the anomalous liquids, the value of k would be similar to that which it possesses for 
the normal liquids. 
The following values of k were found :— 
