126 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . 
LA- 
H 2 0. 
A1 2 0 3 . 
Fe 2 O s . : 
FeO. 
MgO. 
CaO. 
Na 2 0. K 2 0. 
Total. 
Sp.Gr. 
37 
54-7 
1*1 
3-3 
18-1 
3-6 
3 3 
3*9 
6-4 
4-1 
2-0 
100-5 
2-68 
54*2 
1*0 
15-2 
2*8 
9-5 
2-9 
8-6 
5-8 
•9 
101-0 
53-9 
4-6 
18*0 
4-9 
4-6 
7-6 
3-9 
1-1 
98-6 
53-5 
•4 
1-5 
22-2 
3-6 
3-0 
2-0 
9-4 
4-3 
•6 
100-6 
2-80 
52-8 
•1 
28-6 
•2 
•4 
•3 
12-2 
4-8 
•6 
100-0 
52-4 
•2 
2*0 
3-2 
19-5 
4-2 
3 8 
2 3 
8-6 
4-5 
1*1 
101-6 
48-3 
1-0 
•2 
8-5 
17-1 
1-9 
4-9 
34 
9*8 
3-1 
2-4 
100-2 
2-73 
21 rocks 
55-6 
•3 
•2 
2-0 
20-0 
2-7 
3-3 
2-6 
8-5 
3-9 
1-4 
100-4 
2-76 
±i-5 
±2-6 
±1-9 
±1-4 
±i-i 
±8-5 
38 
baa 
b a b 
58-3 
1-0 
22-3 
4*9 
1-2 
2*0 
7-3 
2-8 
1-4. 
100-9 
563 
•6 
20-0 
8-0 
41 
7-2 
2-7 
1-7 
100-6 
56-2 
•7 
21-2 
1-6 
4 '2 
4-0 
6*7 
3-0 
1-7 
99-5 
56-2 
•7 
•5 
1-0 
16-8 
3-0 
4-3 
38 
67 
2-5 
4-5 
100-0 
55*8 
•3 
1*2 
19-0 
5-6 
3-2 
2-8 
7-4 
3-1 
1-2 
99-6 
2-65 
55 '2 
•8 
20-2 
8*2 
5-0 
8-7 
1-8 
•3 
100-1 
54*3 
1-0 
15-9 
6-8 
5-8 
33 
11-3 
1-9 
1-1 
101-5 
2*77 
53*6 
1-3 
20-8 
1-0 
7-6 
1-6 
9-7 
3-3 
1-6 
100-5 
52-8 
•9 
•1 
(•8) 
18-8 
3-3 
4-9 
5*2 
9*6 
3-2 
•6 
100-2 
52-0 
•4 
1*0 
*6 
17-2 
8-2 
2-0 
5*4 
8-2 
3-8 
•9 
99-7 
2*72 
49-9 
3*0 
18-9 
1-5 
7-8 
5-6 
8*5 
2-5 
1-6 
99-3 
2-88 
49-6 
•5 
•6 
5 
17-8 
2-8 
9-5 
5-9 
9-7 
2-9 
99-8 
2-97 
49-5 
•3 
•7 
20-4 
1-3 
9*5 
5*3 
10-0 
2-7 
•2 
ioo-o 
2-96 
47 3 
•5 
7-0 
20-5 
3*2 
5-1 
4-6 
6-5 
3*9 
1-8 
100-4 
14 rocks 
53 3 
•3 
•2 
1 1-4 
19-3 
3-1 
5-8 
4-2 
8-4 
2*9 
1-3 
100-1 
2-82 
v 
y 
Y 
±1-9 
±1-5 
±1-5 
±1-9 
±•9 
±7-7 
39 
baa 
b b a 
55-1 
3-8 
22-6 
6-6 
3-2 
2-7 
4-8 
1-2 
ioo-o 
54-8 
1-4 
25-5 
1-6 
1-6 
2-0 
6-1 
5-7 
1-9 
100-5 
53 3 
'3 
1-4 
16-6 
8-3 
3-2 
1-1 
7 3 
5 3 
3-5 
100-4 
2-67 
53 3 
•1 
17*3 
9-0 
3-4 
•7 
91 
3 4 
3*4 
99-8 
2-69 
530 
2-6 
201 
9-4 
2*6 
6-1 
4-5 
1-3 
99-7 
52-7 
•6 
•8 
2-8 
18-9 
11-0 
2-6 
5*3 
4-0 
2-1 
100-8 
52-6 
3 3 
17-3 
11-8 
2-6 
6-5 
4-2 
2-4 
100-7 
2-72 
51*4 
•8 
•3 
1-6 
20*2 
7-3 
1-5 
5-8 
4-5 
6-7 
100-4 
51*3 
•6 
25-2 
2*9 
8-4 
4-0 
2-5 
3-8 
•8 
99-5 
2-88 
51-1 
1-2 
22-2 
9-3 
2-1 
6-1 
4-1 
3 3 
99-3 
50-6 
*5 
*8 
2-0 
18*5 
13-8 
2-7 
6-2 
3-7 
1-9 
100-7 
50*1 
1-4 
•4 
4-5 
18’9 
3-5 
3-8 
2-1 
6-7 
41 
4-6 
100-2 
48-9 
2-5 
1-2 
•7 
19*4 
4-3 
5-1 
2-0 
8-0 
5-4 
1-9 
99-4 
47-7 
•8 
1-2 
5-2 
19-3 
3-9 
4-9 
3-9 
6-2 
3-6 
4-6 
101-2 
47-0 
•6 
6-4 
22-0 
3*6 
4-7 
4-1 
64 
4-0 
24 
100-6 
