102 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group . 
Si 0 2 . 
Ti 0 2 . P 2 0 5 . 
H 2 0 . 
A 1 2 0 3 . 
Fe 2 0 3 . 
FeO . 
MgO . 
Cao . 
Na 2 0 . 
K 2 0 . 
Total . 
Sp . Gr . 
11 
71-0 
•5 
1-7 
15-4 
•7 
•7 
•2 
. *4 
3-2 
6-2 
1000 
70-9 
1-5 
16-4 
•4 
0 
*3 
4-5 
5-5 
100 T 
2-59 
70-7 
•6 
15-2 
3-8 
•4 
3 3 
4-7 
2-3 
1010 
2 - 67 ? 
70*5 
•5 
16*0 
•8 
1*8 
•8 
20 
3-8 
30 
100-3 
70*4 
•2 *1 
•5 
15*5 
io 
1-3 
•4 
30 
2*8 
5 T 
100-3 
70-2 
•1 
2*2 
15*0 
20 
•2 
•4 
•3 
50 
50 
100-4 
70 T 
•5 -1 
*3 
15-2 
1-8 
1*1 
•7 
2-4 
5-2 
20 
1 oo-o 
69-7 
•3 
2*3 
13-0 
2-3 
10 
•2 
1*2 
3 T 
5-8 
99-8 
69-4 
•8 
15*2 
1-7 
•6 
O 
20 
5 T 
4-5 
100-3 
694 
2*4 
15-1 
31 
11 
2 T 
30 
4-2 
100-9 
2 - 5*4 
69-0 
•8 
16-1 
20 
1-4 
1-1 
3*2 
40 
1-8 
100-0 
2-651 
69-0 
•3 
1-3 
16-1 
2*5 
IO 
•4 
1-3 
5-4 
3'3 
100-5 
2-66 
68-9 
1 - 0 ? 
15-5 
2*5 
•6 
IO 
2 T 
4*7 
37 
1000 
68-2 
•5 *1 
•5 
15*6 
2*3 
O 
IO 
2-8 
5*2 
2-5 
99-7 
• • • 
67-9 
*2 -1 
1-3 
17-3 
2 '4 
•3 
•7 
30 
5 T 
1*7 
100-1 
65-0 
•5 *1 
4-3 
13-7 
•4 
2-2 
•8 
4-4 
37 
4-8 
100-1 
2*62 
64-6 
•3 -1 
5*6 
13*6 
1-2 
1*2 
•7 
5 T 
3-5 
4 T 
100-0 
2-59 
29 rocks 
70-2 
•2 
1*2 
14*8 
1-7 
0 
O 
1-8 
4-5 
4-3 
100-2 
± 1*1 
±•9 
±'•7 
± 1*3 
±io 
±50 
2*63 
12 
a a b 
abb 
1 ( 2 - 40 ) 
71-2 
1*1 
13*4 
1-4 
1*3 
•5 
•3 
20 
9-8 
100-9 
71-0 
1-5 
14*2 
•8 
•7 
IT 
•7 
90 
990 
2*61 
70-8 
•2 
■9 
15-8 
1-2 
1-3 
•3 
3-4 
6'7 
100-6 
2-60 
70-4 
•7 
16*2 
2-5 
0 
2 T 
3-5 
4-3 
100-3 
70-0 
•2 -1 
1-7 
15*1 
•4 
11 
0 
10 
2-7 
6-4 
100-1 
69-9 
•2 
•6 
15-7 
4-7 
0 
1-8 
4*3 
3-2 
101-3 
2-69 
69-6 
1*6 
13*7 
20 
2-4 
•3 
10 
30 
5-2 
100-0 
2-60 
69-5 
•3 *1 
1*0 
15-5 
1-7 
1-3 
•4 
1-3 
4-5 
4-7 
100-3 
68-6 
• 8 ? 
16*2 
23 
•5 
IO 
2-4 
4 T 
4 T 
lOOO 
2 * 6*9 
67*9 
37 
15-7 
30 
1*5 
1-4 
1-5 
50 
100-3 
67-4 
•5 
15-6 
31 
0 
10 
2-5 
7 T 
98-7 
67-4 
■6 *1 
•8 
15*5 
1*8 
2-2 
IT 
30 
35 
3-7 
100-2 
67-3 
•3 
2-4 
15-8 
10 
2*2 
•7 
2*4 
3-8 
30 
100-1 
67-1 
•5 -2 
*7 
150 
1-6 
2-3 
1*7 
3 5 
2-8 
4-5 
99-9 
67*0 
1-0 
16*1 
4-7 
1-2 
1-2 
3 T 
20 
40 
100-9 
66-7 
3*1 
16-7 
21 
O 
1-2 
1-4 
2-5 
5-2 
99-7 
66*6 
2-8 
151 
•7 
31 
1-4 
1-5 
20 
6-7 
99-9 
66-3 
1-2 
15-3 
5-4 
20 
0 
2-8 
40 
99-1 
65*7 
•7 3 
•6 
15*3 
2-5 
10 
10 
2-7 
30 
40 
99-5 
2 * 7*2 
62-2 
*5 *2 
5-9 
14*7 
3-8 
•4 
10 
20 
20 
50 
100-4 
2-63 
20 rocks 
68*1 
■2 -2 
1-6 
15-3 
2*4 
1*1 
IT 
1-8 
20 
5 ‘5 
100-1 
2-66 
± 1-4 
±•6 
±0 
±10 
±io 
± 4-9 
13 
a a b b a a 
71-6 
12-8 
T 
1*5 
3-8 
9-7 
99-7 
70-3 
•7 
16-3 
•8 
•2 
3-7 
50 
4-2 
99-1 
