218 
DR. A. E. H. TUTTON ON THE 
Interfacial Angles of Ammonium Nickel Selenate. 
1 
Angle. 
No. of 
measure¬ 
ments. 
Limits. 
Mean 
observed. 
Calcu¬ 
lated. 
Diff. 
Values of 
Topsoe. 
ac = (100):(001) 
__ 
o / o / 
o / 
73 43 
/ 
o / 
73 41 
as = (100):(101) 
— 
— 
— 
44 56 
— 
— 
sc =(101): (001) 
— 
— 
—. 
28 47 
— 
— 
j 
cr' = (001): (201) 
17 
64 42- 64 52 
64 46 
64 46 
0 
64 50 
cs' =(001): (101) 
— 
— 
— 
39 0 
— 
— 
sY = (101):(201) 
— 
— 
— 
25 46 
— 
— 
r'a = (201): (100) 
— 
-—• 
— 
41 31 
— 
— 
r'c =(201): (001) 
17 
115 8-115 18 
115 13 
115 14 
1 
— 
-ap = (100): (110) 
— 
— 
— 
35 22 
— 
— 
pp' = (110):(120) 
2 
19 20- 19 34 
19 27 
19 28 
1 
19 25 
p'b = (120): (010) 
2 
35 7-35 11 
35 9 
35 10 
1 
— 
PP" = (110): (130) 
— 
— 
— 
29 29 
— 
— 
p"'b = (130) : (010) 
— 
— 
— 
25 9 
— 
— 
pb = (110):(010) 
40 
54 25- 54 48 
54 38 
* 
— 
— 
PPP = (HO): (HO) 
15 
70 36- 70 58 
70 45 
70 44 
1 
70 36 
( cq = (001): (Oil) 
42 
25 44- 25 57 
25 51 
25 51 
0 
25 49 
1 
A b =(011): (010) 
44 
64 4- 64 16 
64 9 
* 
— 
— 
f ao = (100):(111) 
— 
— 
— 
48 10 
— 
— 
| oq = (111): (Oil) 
— 
— 
— 
27 13 
— 
— 
aq =(100):(011) 
— 
— 
— 
75 23 
— 
— 
qo = (011): (Ill) 
— 
i 
— 
35 7 
— 
— 
[da = (Ill): (100) 
— 
■—• 
—- 
69 30 
— 
— 
| co =(001): (111) 
— 
— 
— 
34 22 
— 
— 
1 op =(111):(110) 
— 
— 
42 25 
— 
— 
< 
cp = (001): (110) 
42 
76 37- 76 55 
76 47 
* 
— 
76 51 
pd = (110) : (111) 
11 
57 52- 58 5 
57 57 
58 0 
3 
58 5 
o'c = (111) : (001) 
11 
45 8- 45 21 
45 15 
45 13 
2 
45 4 
[qic =(110):(001) 
32 
103 7-103 24 
103 13 
103 13 
0 
— 
(bn = (010):(121) 
— 
— 
— 
54 31 
— 
— 
no = (121) : (111) 
— 
— 
— 
15 52 
— 
— 
s 
bo = (010):(111) 
— 
— 
— 
70 23 
— 
— 
Los =(111): (101) 
— 
— 
— 
19 37 
— 
— 
(bo = (010): (Ill) 
12 
65 0- 65 10 
' 65 5 
65 2 
3 
— 
< 
os' = (Ill) : (101) 
— 
— 
— 
24 58 
— 
— 
(o'd = (Ill) : (III) 
6 
49 46- 49 56 
49 51 
49 56 
5 
— 
(sq =(101): (Oil) 
— 
— 
— 
37 56 
— 
— 
qp = (Oil):(110) 
33 
87 10- 87 29 
87 17 
87 20 
3 
87 23 
ps = (110):(101) 
— 
— 
— 
54 44 
— 
— 
L pq =(110): (Oil) 
38 
92 31- 92 54 
92 43 
92 40 
3 
— 
f s'q = (101): (Oil) 
— 
— 
_ 
45 37 
— 
— 
qn = (Oil):(121) 
— 
— 
— 
26 28 
— 
— 
np = (121):(110) 
— 
— 
— 
36 16 
— 
— 
QP = (Oil):(110) 
41 
62 32- 62 49 
62 41 
62 44 
3 
62 44 
ps' = (110) : (101) 
— 
— 
— 
71 39 
— 
— 
[pq =(110): (Oil) 
41 
117 11-117 29 
117 19 
117 16 
3 
— 
fr'o' = (201) : (Ill) 
11 
35 7- 35 22 
35 15 
35 16 
1 
dp = (111):(110) 
10 
92 10- 92 27 
92 17 
92 22 
5 
— 
Ipr' = (110): (201) 
22 
52 10- 52 36 
52 25 
52 22 
3 
52 26 
Total number of 
measurements . . 
1 
489 
