DE. A. W. HOFMANN ON THE PHOSPHOEUS-BASES. 
477 
requires 
Theory. 
Experiment. 
r 
' I. 
II. 
III. 
IV. 
V. 
Ci4 
168 
32-43 
32-31 
— 
H 34 
34 
6-57 
6-64 
P 2 
62 
11-97 
I 2 
254 
49-03 
48-92 
48-88 
49-10 
48-88 
518 
100-00 
Fig. 41. 
The di-iodide crystallizes from boiling water in needle-shaped crystals, which often 
attain a considerable size. Quintino Sella has communicated to me the following 
results, which he has obtained on examining these crystals 
“ System trimetric : — 
0 01, 101 = 45° 9' 
1 0 0, 1 10=60° 18'. 
Forms observed: — 
110, 101 (Fig. 41). 
Angles. 
1 1 0, 1 1 0 = 59 24 
101, lOl = 90 18 
1 1 0, 1 01 = 69 26 
According to Naumanx : — 
Forms observed: — 
Calculated. 
O / 
Observed. 
59° 22 
90 16 
69 21 
According to Weiss: 
Forms obseiwed : — 
According to Levy :■ 
Forms observed: — 
Combinations observed : — 
a: 5:c=l-0052: 1:0-5704. 
CO P, P CO. 
a:h-.c=l: 0-5704:1-0052. 
a\h:coc\ a:cob : c. 
MM=120°36'; J : 7? = 1 : 0-8732. 
M, e'. 
110, 101 (Figs. 42, 43). 
110, 101 with other faces, too much rounded to admit 
of correct deteimination (Fig. 44). 
Fig. 44. 
