650 
PROFESSOR W. RAMSAY AYD DR. J. SHIELDS OX THE 
of a physical law. They will be first considered, leaving till later the “ associating ” 
liquids, acetic acid and the alcohols. 
The following table contains numerical data regarding the variation of the molecular 
surface-energy of the “ normal ” lic|uids with temperature, and a comparison with 
numbers calculated by means of the equation y ( Mr ?)* = k [t — d ):— 
Table I. 
1 
Ethyl oxide. 
(Grit, temp., 194°'5 C.) 
7 (Mt-)! = 2T716 (t - 6-5). 
Methyl formate. 
(Grit, temp., 214° C.) 
7 (Mu)5 = 2-0419 (t - 5-9). 
Ethyl acetate. 
(Grit, temp., 251° 
7 (Mi;)a = 2-2256 (t - 
C.) 
- 6-7). 
t(cent.). 
' 
7(Mt;). 
t (cent.). 
7 (j\lt’)L 
t (cent.). 
7 (Mt-)t 
T. 
T. 
Font! cl. 
Cal. 
Found. 
Cal. 
Found. 
Cal. 
O 
O 
Ero-s. 
Erg-s. 
O 
o 
Ergs. 
Ergs. 
o 
0 
Ergs. 
Ergs. 
20 
174-5 
363-7 
360-5 
20 
194 
383-9 
384-1 
20 
231 
500-7 
499-2 
40 
154-5 
317-4 
317-1 
30 
184 
363-7 
363-7 
80 
171 
367-2 
365-7 
50 
144-5 
296-0 
295-3 
40 
174 
343-2 
343-2 
90 
161 
344-4 
343-9 
60 
134-5 
272-8 
273-6 
50 
164 
322-6 
322-8 
100 
151 
321-7 
321 2 
70 
124-5 
251-0 
251-9 
60 
154 
302-5 
802-4 
110 
141 
299-0 
298-9 
80 
114-5 
229-5 
230-2 
70 
144 
282-7 
282-0 
120 
131 
277-1 
276-6 
90 
104-5 
208-1 
208-4 
80 
134 
262-0 
261-6 
130 
121 
254-7 
254-4 
100 
94-5 
186-9 
186-8 
90 
124 
241-5 
241-1 
140 
111 
231-9 
232-1 
110 
84-5 
165-3 
165-0 
100 
114 
221-2 
2-20-7 
150 
101 
209-6 
209-9 
120 
74-5 
143-6 
143-3 
110 
104 
200-5 
200-2 
160 
91 
187-1 
187-6 
130 
64-5 
1220 
121-6 
120 
94 
180-0 
179-9 
170 
81 
164-8 
165-4 
140 
54-5 
100-4 
99-9 
130 
84 
159-4 
159-5 
180 
71 
143-0 
143-1 
150* 
44-5 
78-7 
78-2 
140 
74 
138-3 
139-1 
190 
61 
120-4 
120-8 
160 
34-5 
58-6 
56-5 
150 
64 
118-0 
118-6 
200 
51 
98-9 
98-6 
170 
24-5 
39-0 
34-8 
160 
54 
97-1 
98-2 
210* 
41 
78-4 
76-3 • 
180 
14-5 
19-9 
13-0 
170 
44 
76-9 
77-8 
220 
31 
56-8 
54-1 
185 
9-5 
12-3 
2-2 
180 
34 
57-3 
57-4 
230 
21 
35-7 
31-S 
190 
4-5 
5-5 
- 8-7 
190 
24 
37-7 
37-0 
240 
11 
15-9 
9-6 
194-5 
0-0 
0-0 
200* 
14 
19-2 
16-5 
245 
6 
7-2 
- 1-6 
210 
4 
4-0 
- 3-9 
251 
0 
0-0 
214 
0 
0-0 
. 
