146 
Proceedings of the Royal Society of Edinburgh, 
[Sess. 
List of 1000 Rocks 
Group. 
59 
12 rocks 
60 
4 rocks 
61 
14 rocks 
62 
Si0 2 . 
Ti0 2 . P2^5* 
h 2 o . 
A1 2 0 3 . 
Fe 2 0 3 - 
FeO. 
MgO. 
CaO. 
Na 2 0. K 2 0. 
Total. 
38-9 
63 
10*3 
4-9 
7-0 
23-6 
6*0 
1-3 
•8 
99T 
38-8 
•9 
99 
6-8 
8*8 
2-0 
26*3 
3*9 
•8 
2-6 
100-8 
41-6 
•4 
•1 
4-7 
9-2 
55 
8-0 
22*0 
6-8 
IT 
•8 
100-1 
y 
y 
±1-6 
±1*5 
±2*3 
cT 
+1 
±i-o 
±8-6 
b b b 
abb 
40-0 
•6 
4*3 
8 3 
2-0 
12-0 
27-6 
4-2 
•7 
•3 
99*8 
39-1 
5*7 
4-9 
4-8 
11-9 
29*2 
4*2 
99-6 
37-1 
•4 
■1 
5-1 
5-0 
8-9 
8*0 
26-9 
6T 
•4 
•5 
98-6 
31-8 
2*5 
1-4 
15*6 
14*3 
33T 
•9 
99-6 
37-0 
•2 
4-3 
4-9 
7-8 
11*8 
29*3 
3-8 
•3 
•2 
99-4 
±3-8 
±1-8 
±5-4 
± 
•5 
± -5 
±12-0 
b b b 
baa 
51*3 
13-6 
•5 
8*5 
12-7 
12-4 
1*4 
•3 
100-8 
50-4 
1*0 
8-7 
IT 
6-5 
17-6 
11-6 
3-0 
•5 
100-3 
501 
2-6 
6-9 
2T 
5-3 
16-2 
16-7 
•7 
100-6 
50-0 
1-3 
15-4 
6-7 
10-0 
14*9 
1-8 
•3 
100-4 
49'1 
•2 
8-5 
6*4 
20-8 
12-9 
1-7 
•6 
100-1 
48-4 
•7 
•5 
2-8 
11*6 
4T 
3-6 
12-6 
8T 
4T 
3-2 
99-9 
47*0 
1-5 
•2 
(*6) 
10-0 
1-0 
10-5 
11-5 
14*5 
3-2 
•3 
100-3 
46-7 
•8 T5 
1*3 
10-0 
3*5 
8*5 
9*7 
13-2 
1*8 
3*8 
100-9 
46-6 
•4 
9-5 
3-4 
9T 
13-5 
15-8 
1*7 
100-0 
46-2 
3*4 
13-9 
5-3 
1-8 
11-6 
15-7 
IT 
•3 
99-2 
45-5 
•2 
•4 
(•2) 
19-3 
•5 
4-2 
10T 
16-7 
2-3 
•6 
100-0 
43-4 
6*7 
9-4 
8-9 
10-4 
15-4 
1-5 
3-2 
98-8 
42*3 
1-5 
2-5 
12*7 
10*6 
12-7 
13*0 
2-7 
•9 
98-9 
36-5 
(5*2) 
3-4 
8*2 
8-3 
7-3 
8-2 
18-9 
2T 
IT 
99-2 
46-7 
•7 
•2 
1-9 
11*3 
3-4 
5*7 
12-7 
14-3 
2T 
IT 
100-0 
±1-9 
±2-7 
±2*5 
±2-5 
±1-3 
±10-9 
b b b 
b a b 
47 '3 
•8 
•6 
2*1 
11-2 
2-9 
5-9 
16-0 
73 
1*9 
3-8 
99-9 
47-3 
•3 
16-9 
1-6 
2*7 
21-0 
8*6 
1*2 
•4 
99-9 
474 
•8 
17*0 
1-6 
3-6 
19-9 
9 '2 
•5 
•3 
100-0 
44-4 
•6 
17-6 
1-4 
3*9 
15T 
16-0 
•8 
T 
100-0 
43-8 
2*3 
•5 
1-0 
10*9 
3-5 
10T 
12-8 
13-8 
2-2 
•3 
101-2 
42-4 
1*8 
I/O 
1*8 
12-3 
3*9 
7 3 
13T 
12-7 
2*7 
1*0 
100-0 
42-3 
1*2 
15*4 
2-7 
6-0 
19*3 
12-0 
1-0 
•2 
100-1 
41-4 
•3 
1-1 
9-8 
3*3 
5 -2 
13*4 
16-6 
1*6 
7*4 
100-1 
40-8 
•3 
5*2 
11-9 
10-4 
14-2 
18*4 
101-2 
38-7 
6-9 
10-2 
6-3 
6T 
18-6 
10-4 
1-5 
1*6 
100-3 
38 3 
1-6 
•2 
5-4 
9-8 
4-3 
6-4 
17*4 
10-3 
2-9 
2T 
99-2 
Sp. Gr. 
3-16 
2-99 
2-93 
3-00 
3-09 
3*09 
2-76 
2-99 
