1237 
4. After having reduced the metal (500 grms. “Wismuth Kanipaum’”) 
to a fine powder, we studied its behaviour in a dilatometer. The 
metal had „of undergone any previous treatment with an electrolyte. 
At 70°C. there did not occur any transformation. 
5. After this the bismuth was kept in contact with a solution 
of potassiuin chloride (10 per cent) during 12 hours, and put again 
into a dilatometer. The results are given in Table I. The values 
indicated with A represent the duration of the observations (minutes), 
those indicated with B the level on the millimeter scale. 
TABLE I. 
70°.0 || 812.0 || 909.0 || _ 96.0 
wien i | 4 | PiReb li) < 
PY Se at er i: arr cy: eee ea 
| U 
o- |.382 || o | 275 || o | t92 || 90 | 207 
15 | 190 || 45 | 160} 20 | 187 || 40 | 155 
32 | 64 || 65 | 120 |} 80 | 176 || 210 | 161 
45 Ohe-O0 «loden hone Vos 164 
|| 290 
6. Comparing these measurements with those carried out formerly *) 
with a preparation of different previous thermal history (see table !1) 
it is evident that there exist more than two forms of bismuth. 
TABLE Il. 
Temperature 
99-7 
93.7 
87.7 
71.7 
15.1 
14.1 
15 
‚Duration of the ob- 
Rise of the level 
| servations in hours | in mm. 
20 + 450 
2 + 16 
13 + 12 
30 + 16 
24 | + 10 
14 | — 10 
36 — 95 
Whilst we found formerly (Table IT) at 81° and 90° an increase 
of volume, we now find a decrease (Table I) at these temperatures. 
1) Zeitschr. f. physik. Chemie 85, 419 (1915). 
82 
