104 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
TiCV P 2 0 6 . 
h 2 o. 
AI2O3. 
Fe 2 0 3 . FeO. 
MgO. CaO. 
Na 2 0. K 2 0. 
Total. 
Sp. Gr. 
13 
68-7 
•3 
•6 
17-1 
•9 
•4 
•4 
2-3 
7-0 
38 
101*5 
68-6 
•4 
(1-9) 
16-5 
•9 
1*1 
•2 
4-2 
1-9 
5-6 
101-8 
68*2 
1*4 
16-9 
1-6 
1-1 
2-2 
5 3 
3*0 
99-8 
... 
68-0 
•7 
17-5 
•4 
•5 
5-8 
7*1 
99-9 
2-60 
67-5 
•5 
17-8 
2-5 
•1 
*4 
1-7 
5-0 
4-4 
99-9 
66-3 
•2 
1-3 
17*6 
2*2 
•6 
1-0 
3T 
5-2 
2-5 
100-0 
65-9 
•4 
1*4 
16-8 
1*6 
1*2 
1-5 
2*7 
4.7 
3 2 
99-4 
2*62 
65*6 
•9 
17-2 
•2 
3*2 
1-4 
3 4 
3-8 
3-1 
98-8 
65*5 
1*5 
19-9 
1-6 
1*4 
2-0 
5-8 
2-4 
100-2 
11 rocks 
67-8 
•1 
1-0 
16-9 
1*2 
•6 
•7 
24 
4-9 
4*5 
100-0 
2-61 
± i-5 
±10 
±•9 
±1-1 
±i-8 
±6-3 
14 
a a b b a b 
69'2 
•8 
15-6 
1*1 
1*3 
•1 
1*3 
1*7 
8-9 
999 
66-7 
•8 
13*6 
?4 
•7 
1-0 
5-8 
9-0 
101-0 
663 
18-8 
1-4 
•5 
1*2 
3-0 
8-8 
100-0 
65-8 
1-9 
15-9 
5T 
1*7 
3-5 
6-2 
ioo-o 
2-68 
65-7 
1*1 
17-9 
4-3 
*5 
1*3 
5*7 
3*5 
100-0 
2-50? 
65*4 
1-8 
17-1 
1-7 
1*1 
•4 
2-5 
4-8 
6-9 
10T7 
65-3 
•4 
2*1 
15-9 
1-2 
2-2 
1*5 
3*0 
2-8 
5-7 
101-0 
2*55 
64-0 
20*4 
2-8 
1-3 
4-5 
3-3 
3-5 
99-6 
• • • 
i 
638 
7 -2 
•4 
17-4 
•1 
1-5 
•9 
1*7 
6-7 
6-0 
99-3 
62-7 
1-7 
17-3 
•5 
2-3 
1-4 
3*2 
4*5 
63 
99*9 
61-1 
3 5 
18*6 
2*6 
1*1 
2*9 
32 
6-8 
99*8 
2*59 
11 rocks 
65*1 
•1 
1*3 
17*1 
1-7 
1-3 
•8 
2*2 
4-1 
6*5 
j 
100-2 
2-60 
±1-5 
±1*4 
± : 8 
±1-3 
±1-6 
±6-6 
15 
a a b b b a 
64-5 
19*8 
2-2 
•2 
1-0 
•6 
4-1 
7-6 
ioo-o 
61-9 
•4 
1*4 
18*2 
•3 
2*9 
1-0 
1*7 
5*5 
6-2 
99-5 
60-4 
•6 
22-6 
•4 
2*3 
•1 
•3 
8-5 
4-8 
ioo-o 
2-7*5 ? 
60*1 
1*2 -1 
1-6 
20-0 
2*4 
1-3 
•8 
•9 
63 
6-0 
100-7 
• • • 
59-4 
•5 
(•5) 
18-4 
4-3 
•4 
•6 
2-2 
4.7 
6-7 
98-3 
• t • 
58-3 
5*9 
20-9 
4*2 
1-1 
2*2 
4-1 
3-9 
100-5 
• • • 
58-2 
1-7 
23-2 
1*5 
2-4 
6*9 
6-6 
100-5 
57’6 
•2 
3*2 
17-5 
3*5 
1*2 
•2 
1*4 
5-8 
9*2 
99-9 
• • • 
57’4 
•4 
1*7 
23-1 
1-9 
•1 
1*7 
8-1 
5*7 
100-2 
55-7 
4*3 
20-6 
3-1 
•4 
1-4 
7*1 
5’6 
98-3 
T 
10 rocks 
59-5 
•2 -1 
2*1 
20*5 
2-4 
•8 
•5 
1-5 
s 
6-1 
6*2 
S 
99-9 
2-75 
±1-6 
±1*7 
±•9 
±•6 
±1-3 
±6-1 
