444 
chose the experimental temperature in such a manner that we could 
expect according to Trrwoer’s diagram a partly fused mixture but 
always satisfied ourselves that this condition in A really existed, 
which is possible when the apparatus topples over. The experiments 
were all continued until a perfectly constant end value was 
attained (usually 24 hours). 
4. In the subjoined table are mentioned the results of the expe- 
riments. In Fig. + they are found indicated graphically combined 
with the well-known Tx-diagram. The additional triple point tensions 
are taken from the research of Ramsay and Youna. ') 
TABLE. 
Three-phase tension in the system Br—I. 
Vapour tension 
in 
Experim. | Gram | Gram Atom 9% Experiment. 
| number ee lodine _ lodine et ande m.m. mercury | 
| do len a ACC as 19% | 83.0 | 
| 10 16.20 | 14.49 | 35.9 oe pee 85.8 
| 9 16.20 | 14.49 | 35.9 zp OA 85.0 | 
2 16.15 | 19,79 | 43.6 31.0 | 79.5 
| 6 15385) |. BEER | ATA 36.0 | 64.1 
| 4 16:25. | 25.90 | 50_ 40.4 | 48.2 
1 15.33 | 24.94 | 50.5 40.4 | 48.2 
5 15.61 | 26.11 51.4 42.0 | 45.4 
3 15.55 | 29.82 54.7 M3 | 42.7 
| 7 9.88 23.95 60.4 47.9 | 54.6 
| 8 9.88 | 23.95 | 60.4 50.0 | 56.7 
ieee 0.93 | 19.90 | 92.9 100 | > 200 
| | 
Experiment 12 was executed in the thermostat with boiling water. 
The three-phase tension was so high that it surpassed the measuring 
capacity of the manometer. 
The results are quite in harmony with the expectations developed 
in § 2. A plain maximum at 23° and a sharp maximum at 44° have 
been determined whilst experiment 12 proves the existence of a 
second maximum. 
1) Journ. chem. Soc. 49, 453 (1886). According to a research of STELZNER and 
NIEDERSCHULTE Verh. phys. Ges 7, 159 (1905), the triple point of I would appear 
to lie a few m.m. higher. 
