100 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . P2O5. 
H 2 0. 
A1 2 0 3 . 
Fe 2 0 3 . FeO. 
MgO. 
CaO. 
Na 2 0. 
K 2 0. 
Total. 
Sp.Gr. 
9 
75*5 
•9 
11-2 
•4 
•1 
•3 
•8 
3-0 
8-0 
100T 
75-4 
•4 
7.7 
1-4 
T 
1*3 
1-6 
8T 
4*5 
100-6 
2-39 
75*2 
•6 
11*1 
1-8 
IT 
1-6 
4*0 
4*5 
100-0 
743 
•4 
•2 
14-7 
•8 
•9 
4-6 
4-5 
100-0 
73-8 
2-9 
10-8 
1-8 
1-3 
1-2 
43 
39 
100-0 
72-9 
•5 
1-2 
12-9 
•7 
IT 
•8 
•8 
37 
5-0 
99-6 
2-64 
72-7 
11 
13*8 
1*0 
•7.: 
2T 
4-9 
4-3 
100-5 
71-5 
1-7 
13-5 
1*2 
•9 
1*4 
32 
2-6 
4-0 
ioo-o 
71-3 
•1 
15*7 
1-5 
'3 
•9 
3-4 
4*8 
2 3 
100-3 
70-5 
1*2 
15 9 
1*0 
1*4 
1-6 
4*9 
2'7 
99*2 
14 rocks 
74-1 
•1 
•9 
12*9 
*7 
# 5 
•7 
1*4 
4.4 
4*6 
100-2 
2-64 
v 
y 
Y ' 
±1-4 
±1*6 
±•6 
±1*2 
±1T 
±5-9 
(2-39) 
10 
a a b 
a a b 
73 3 
•4 
13-0 
1-0 
1*8 
1-0 
3-5 
5 ‘6 
99-6 
2-64 
73*0 
•1 
2-0 
13-7 
2*0 
IT 
2-0 
1-5 
39 
1*5 
100-8 
2-69 
72*5 
•7 
11-5 
21 
2-7 
1-8 
3 4 
5-2 
99-1 
72-2 
1-1 
13-6 
1-3 
1*5 
1*5 
2-2 
2-7 
3-6 
99-7 
71*8 
•6 
16-0 
1*8 
1*8 
1*7 
3 5 
4-2 
101-4 
70*8 
•4 -1 
•6 
15-1 
1-0 
1*4 
*7 
3-2 
3T 
3-6 
100-1 
70-4 
1-4 
13-9 
34 
2-5 
3-4 
1-5 
3-6 
lOOT 
2*70 
70*1 
•7 *1 
•8 
15T 
1*7 
1*2 
1*2 
2-6 
3-6 
2-8 
ioo-o 
69*8 
3*2 
14*2 
•1 
2-8 
•6 
1*7 
3-3 
4-5 
100-2 
69-4 
•1 
1-2 
14-3 
36 
2-4 
3-2 
2-7 
2-7 
996 
2 
69-4 
•2 
•3 
12-8 
1-1 
2 6 
•7 
4.7 
3T 
5*2 
100-2 
2-66 
68-9 
1-6 
14-7 
*9 
2-2' 
1-6 
3-0 
37 
2-8 
99-4 
2-67 
68*5 
2-3 
14-7 
•4 
3*3 
1*4 
2-8 
2*9 
4T 
100-5 
13 rocks 
70-8 
•1 
1-2 
14-0 
1-0 
2-0 
I 1*5 
2*5 
3T 
3-8 
ioo-o 
2-67 
Y 
±1-2 
±•9 
±•5 
±1-0 
±1T 
rt 4-7 
11 
a a b 
aba 
72”9 
•6 
12-9 
3*0 
•4 
•9 
7T 
30 
100-8 
72-7 
•5 
12-8 
2-6 
1*5 
T 
•6 
6-5 
3-9 
101-2 
... 
726 
•7 
14-8 
•9 
•2 
1*2 
4-9 
53 
100-6 
72*3 
*4 
13-4 
1-1 
1-6 
•7 
4*3 
5*6 
99-4 
2*64 
72-2 
•6 
•7 
14-8 
1*0 
•9 
•3 
•7 
4-2 
5*2 
100-6 
724 
•3 
14-9 
1-3 
1-3 
4T 
5-9 
99-8 
2*70 
71*6 
•7 
13-6 
2-4 
•2 
2-3 
5-6 
3‘5 
99-9 
2-67 
71*4 
1-5 
14-8 
1*7 
•7 
*6 
T 
4-8 
5-2 
100-6 
713 
•3 
•8 
13-9 
1-3 
1-2 
•5 
1*0 
33 
6-3 
99-8 
71-1 
•3 -1 
•3 
15-9 
•6 
1*6 
•5 
2*7 
3*5 
4T 
100-6 
... 
711 
1*0 
14-6 
1*7 
•2 
1*5 
3 3 
6-0 
99-3 
71-0 
•6 
13-8 
3*7 
•6 
IT 
5-2 
4*0 
100-0 
(2-40) 
