52 
i\rESSRS. C. T. HEYCOCK AND F, H. NEVILLE ON 
Table VIIIa.—F reep^in^ Points of Alloys made by adding Antimony to Silver. 
200 grams Silver. 
(1) 
Total weight of 
antimony present. 
(2.) 
Percentage of 
antimony. 
(3.) 
Atomic 
percentage of 
antimony. 
(4.) 
Freezing point on 
the Centigrade 
scale. 
(5.) 
Atomic fall. 
0 
0 
0 
958-8 
1-089 
-542 
-486 
954-6 
8-64 ; 
2-758 
1-361 
1-222 
947-8 
9-00 
5-987 
2-907 
2-615 
934-3 
9-37 
12-16 
5-732 
5-173 
906-9 
10-03 
22-39 
10-068 
9-124 
853-6 
11-53 
41-40 
17-15 
15-66 
734-3 
14.33 
63-52 
24-10 
22-17 
608-3 
15-81 
73-92 
26-99 
•24-91 
561-5 
15-95 
84-59 
29-72 
27-50 
545-2 
89-75 
30-98 
28-71 
539-1 
95-23 
32-26 
29-93 
532-5 
106-97 
34-85 
32-43 
520-7 
118-49 
37-21 
34-70 
510-7 
126*39 grams Silver. 
74-88 
37-21 
34-70 
511-5* 
86-00 
40-49 
37-90 
499-1 
97-18 
43-47 
40-83 
488-9 
1 
117-72 
48-23 
45-53 
493-4 
>5 
?? 
(485-0) 
>1 
(485-4)t 
128-31 
50-38 
47-67 
496-8 
158-80 
55-69 
52-99 
509-6 
Up to 40’83 atomic per cents, of antimony the pure metal from tartar emetic was 
used, beyond this concentration the commercial antimony was used. 
Up to 2'G atomic per cents, the temperature at the F.P. was very steady. 
Up to 10 per cents, abundant precipitate was noticed at the moment of freezing. 
At 15‘66 there was but little precipitate noticed at the freezing point, but the person 
stirring could detect a change at tlie moment when the pyrometer indicated the 
freezing point. At 22’17 no precipitate was noticed at the freezing point. At 24*91 
a little precipitate was noticed. 
At 27*5 there was a copious precipitate at the freezing point. The temperature 
at the freezing point remained constant for some time, and 20° lower the alloy 
seemed to set to a solid mass. 
From 27'5 onwards the temperatiu'es at the F.P. are very constant to the end of 
the series at 53 atoms of antimony, the eutectic F.P., 485° C., having its usual 
character of complete constancy. 
* Residv^e of the jirecediug alloy after removal of 117’2 grams. 
■f Freezing jioint, taken on the I'esnmption of the experiments next day. 
