152 
THE ROMAN COMAGMATIC REGION. 
Norms of Roman Rocks. 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
i... 
39-5 
42.3 
43.4 
53.9 
45.0 
52.8 
51.7 
49.5 
62.3 
56.7 
51.7 
Ab 
46.6 
39.3 
35.4 
26.8 
41.4 
23. i 
21-5 
5-8 
An 
2 8 
12 8 
13 6 
12.5 
Lc 
Ne 
5.1 
8.0 
9.5 
7.0 
3 -4 
0.6 
2.O 
0.9 
9.9 
4-3 
S-8 
HI 
0.5 
0.8 
0.7 
Th 
C 
Ac 
3. 7 
Di 
3.2 
1. 9 
6.8 
Hy 
Wo... 
0.5 
0.5 
0.5 
Ol 
0.6 
0.6 
0.8 
2 -4 
3.0 
Am 
Mt . 
i 6 
2 6 
4 6 
11 
o 8 
o 6 
Hm 
0.6 
1.8 
1.8 
Ap 
Rest 
0.3 
o 6 
i .0 
0.8 
1.6 
100.3 
100. 
100.2 
100.7 
100.6 
100, I 
100.3 
100.3 
100.8 
99.8 
100.7 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
ii 8 
r... 
62 3 
37 8 
42 8 
Ab... 
6 i 
16 8 
An. .. 
12 8 
18 4 
8 6 
Lc 
28 8 
Ne 
10.8 
19.3 
5.7 
6.3 
7.8 
HI... 
Th 
C 
Ac 
Di... 
2.6 
6 o 
6 i 
Hy 
8.1 
18 9 
Wo 
3.0 
4-6 
Ol 
Am 
Mt 
2 6 
2 8 
11 
i-5 
i 8 
o 8 
Hm.. . 
o 8 
Ap 
0.4 
o 7 
o 6 
O-S 
Rest 
o 6 
i 6 
o 6 
99.6 
100.6 
99.9 
100.6 
IOO.2 
IOO.I 
100.7 
IOO.I 
99.6 
100.2 
IOO.5 
23 
24 
25 
26 
27 
28 
29 
30 
31 
32 
33 
Q... 
4-3 
Or. 
42 8 
38 9 
61 7 
Ab 
32.5 
21.5 
13.6 
6.8 
24.6 
0.5 
An... 
9.5 
17.0 
n.6 
11.4 
Lc 
19.8 
12.6 
16.1 
3-S 
Ne... 
6.3 
6 4 
13. i 
9-7 
HI 
Th... 
C 
Ac... 
Di 
Hy... 
9.1 
5-9 
13-2 
13-6 
8.5 
8.0 
5-7 
12. I 
17.7 
IS-S 
Wo... 
Ol 
i . 7 
3.3 
7.2 
I.O 
3.6 
2.O 
4- 2 
5-7 
Am 
Mt 
3-3 
3.5 
1.9 
5.8 
4.4 
5.8 
2 .3 
3.5 
S-8 
4-9 
3.7 
11... . 
2-7 
1.4 
i 5 
Hm... 
1-4 
Ap 
0.8 
1.3 
i .0 
I.O 
0.4 
O.3 
0.9 
o. 7 
I .O 
I.O 
Rest 
1.9 
0.8 
0.7 
o 8 
1.2 
99.6 
99.9 
100. I 
IOO.O 
99-8 
99.8 
100.3 
100.4 
99.6 
100.3 
100.7 
