1X72 PROFESSOR M. BELLATI AND DR. R. ROMANESE ON THE SPECIFIC 
Cu 2 I 2 .4AgI. 
From 0° to 180° 0., slight expansion. 
„ 180° ,, 199° 0., neither expansion nor contraction. 
,, 199° ,, 282° O., contraction. 
„ 282° „ 493° C., expansion. 
The following table gives a summary of our experiments :— 
Cu 3 I 2 .4 Agl. 
No. 
t. 
T. 
Q. 
Difference, 
Observed. 
Calculated. 
r. 
16 
° C. 
15-47 
° C. 
98-94 
5-129 
5-110 
+ 0-019 
° c. 
13-8 
17 
15 61 
102-29 
5-298 
5-319 
-0-021 
13-9 
18 
16-83 
173-72 
10-093 
10-094 
-o-ooi 
13-6 
19 
15-91 
168-25 
9-764 
9-761 
+ 0-003 
12-8 
20 
17-67 
293;5 
26-62 
26-57 
+ 0-05 
9-0 
21 
2007 
295-5 
26-52 
26-57 
-0-05 
11-6 
22 
20-91 
339-9 
29-58 
29-64 
-0-06 
11-4 
23 
21-61 • 
337-6 
29*49 
29-44 
+ 0-05 
12-2 
c= 0-056526+ 0-0000410 (T + tf) 
^=0-0702 
X=7-95 (at 230° C.). 
Cu 2 I 2 .3AgI. 
From 0° to 194° C., expansion. 
„ 194° „ 214° 0., neither expansion nor contraction. 
„ 214° „ 280° C., contraction. 
„ 280° „ 494° C., expansion. 
Our results are as follows :— 
Cu 3 I 2 .3AgI. 
No. 
t. 
T. 
Q. 
Difference. 
r. 
Observed. 
Calculated. 
° C. 
°C. 
°c. 
24 
14-48 
60-59 
' 2-846 
2-846 
13-7 
25 
13-85 
179-12 
10-781 
10-747 
+ 6-034 
10-4 
26 
11-88 
179-63 
10-867 
10-901 
-0-034 
8-4 
27 
17-00 
290-0 
26-27 
26-27 
8-7 
28 
19-31 
289-9 
26-13 
26-13 
11-2 
29 
20-28 
338-3 
29-59 
29-58 
+0-01 
10-9 
30 
19-30 
343-2 
29-99 
30-00 
-o-oi 
9-8 
c=0-059624+0-0000280 (T + t) 
c 1= 0-0726 
A=7’74 (at 240° O.). 
