14 
DR. A. E. H. TUTTON ON THE 
Intebfacial Angles of Ammonium Cobalt Sulphate. 
Angle. 
! No. of 
measure¬ 
ments. 
Limits. 
Mean 
observed. 
Calcu¬ 
lated. 
1 
Diff. 
Values of 
Marignac. 
[ac =(100): (001) 
_• 
o/o / 
o / 
72 58 
' 
73 4 
as =(100):(101) 
—• 
— 
— 
44 43 
— 
— 
sc =(101): (001) 
—■ 
— 
— 
28 15 
— 
— 
cr' =(001): (201) 
17 
64 37- 64 59 
64 52 
64 46 
6 
64 48 
cs' = (001): (101) 
— 
— 
— 
38 41 
— 
— 
sV = (101):(201) 
— 
— 
— 
26 5 
— 
— 
r'a = (201): (100) 
— 
— 
— 
42 16 
— 
— 
[ r'c = (201): (001) 
16 
115 2-115 21 
115 8 
115 14 
6 
— 
[ ap =(100): (110) 
— 
— 
— 
35 14 
— 
— 
VP = (110):(120) 
— 
— 
— 
19 28 
— 
— 
p'b = (120) : (010) 
— 
— 
— 
35 18 
— 
— 
■< 
pp'" = (110) : (130) 
— 
— 
— 
29 30 
— 
— 
p'"b = (130) : (010) 
—■ 
— 
— 
25 16 
— 
— 
pb = (110):(010) 
40 
54 38- 54 52 
54 46 
* 
— 
— 
L PP = (HO): (110) 
20 
70 23- 70 33 
70 28 
70 28 
0 
70 32 
$ cq = (001): (Oil) 
31 
25 12- 25 39 
25 26 
— 
25 15 
\qb = (Oil): (010) 
33 
64 27- 64 52 
64 34 
64 34 
0 
[ao = (100): (111) 
— 
— 
— 
47 52 
— 
— 
oq =(111): (011) 
4 
26 41- 26 51 
26 47 
26 47 
0 
26 47 
aq =(100):(Oil) 
1 ' 
— 
74 29 
74 39 
10 
— 
qo = (Oil): (Ill) 
5 
34 54- 35 6 
35 2 
34 57 
5 
34 55 
[da = (Ill) : (100) 
1 
— 
70 33 
70 24 
9 
— 
co = (001): (111) 
9 
33 42- 33 52 
33 46 
33 45 
1 
33 40 
op = (111): (110) 
9 
42 18- 42 29 
42 22 
42 24 
2 
— 
■{ 
cp =(001): (110) 
40 
75 55- 76 24 
76 9 
* 
— 
76 14 
po' = (110) : (111) 
16 
58 40- 58 59 
58 52 
58 56 
4 
— 
dc = (111):(001) 
16 
44 50- 45 25 
44 57 
44 55 
2 
44 54 
[bn =(010):(121) 
— 
— 
— 
55 1 
— 
| no = (121): (111) 
— 
— 
— 
15 42 
— 
— 
-\bo =(010): (111) 
7 
70 35- 70 46 
70 41 
70 43 
2 
— 
| os =(111):(101) 
—- 
— 
— 
19 17 
— 
— 
[oo = (111): (111) 
1 
— 
38 38 
38 34 
4 
38 39 
"bo' =(010): (Ill) 
7 
65 6- 65 20 
65 10 
65 11 
1 
— 
o' s' = (111): (101) 
- r 
— 
— 
24 49 
— 
— 
Jo' = (111): (111) 
1 
— 
49 42 
49 38 
4 
49 20 
"sq =(101): (Oil) 
— 
— 
— 
37 18 
— 
J 
qp = (Oil):(110) 
37 
88 2- 88 29 
88 12 
88 11 
1 
1 
ps = (110) : (101) 
— 
— 
— 
54 31 
— 
— 
<-Vq =(110): (Oil) 
38 
91 27- 91 57 
91 47 
91 49 
2 
— 
' s' q =(101): (Oil) 
— 
— 
— 
45 11 
— 
— 
qn = (Oil) : (121) 
— 
— 
— 
26 6 
— 
— 
np = (121) : (110) 
—- 
— 
— 
36 15 
— 
— 
qp = (Oil):(110) 
36 
62 7- 62 28 
62 21 
62 21 
0 
— 
ps' = (110) : (101) 
— 
— 
— 
72 28 
— 
— 
dPq =(H0): (Oil) 
36 
117 29-117 52 
117 40 
117 39 
1 
— 
"r'd = (201): (Ill) 
17 
35 9- 35 37 
35 21 
35 23 
2 
35 28 
o'p = (111): (110) 
18 
91 44- 92 5 
91 54 
91 48 
6 
— 
pn' = (110) : (201) 
36 
52 36- 52 52 
52 43 
52 49 
6 
52 40 
Total number of 
measurements . . 
492 
