( 608 ) 
§ 6. Great difficulties were experienced in the determination; 
when we dealt with mixtures containing much tellurium' every pre¬ 
caution had to be taken to prevent the boiling off of the sulphur, 
and in the case of complexes containing much sulphur trouble arose 
from the great viscosity of the fusions and the very slow crystallisation 
of the masses. If the percentage of sulphur exceeds 80, the deter- 
MELTING POINT DIAGRAM OF SULPHUR-TELLURIUM COMPLEXES. 
Mol. o/ 0 
% by Weight 
Initial 
solidifying 
End 
solidifying 
Period of 
solidifying 
Sulphur 
Sulphur 
point 
c° , j 
P Co nt 
seconds 
0 
0 
452* 
- 
5 
1.3 
440 
437 
- 
to 
2.7 
435 
430 
- 
15 
4.2 
431 
423 
- 
20 
5.9 
426 
- 
- 
25 
7.7 
421 
- 
0 
30 
9.7 
413 
103 
30 
35 
11.9 
401 
102 
60 
40 
14.4 
394 
106 
80 
45 
17.1 
389 
104 
- 
50 
20 
387 
105 
100 
55 
23.5 
385 
105 
- 
GO 
| 27.4 
374 
109 
- 
65 
31.7 
368 
101 
106° 
145 
66.67 
33:4 
366 
105 
160 
70 
36.9 
361 
105 
- 
75 
43 
348 
108 
180 
80 
50 
339 
109 
180 
85 
58.7 
- 
110 
210 
90 
69.3 
288 
108 
230 
95 
82.7 
- 
109 
260 
98 
92.4 
- 
110 
- 
100 
100 
115 
- 
