110 
Proceedings of the Royal Society of Edinburgh. 
[S 
ess. 
List of 1000 Rocks 
Group . 
Si0 2 . 
Ti0 2 . 
PA. 
h 2 o. 
A1 2 0 3 . 
Fe 2 0 3 . 
FeO . 
MgO . 
CaO . 
Na 2 0 . 
K 2 0 . 
Total . 
Sp . Gr . 
21 
aba 
baa 
67*8 
•3 
16*9 
11 
23 
1-3 
33 
4-4 
3*4 
100*7 
67-4 
•1 
•1 
15-9 
1*4 
1*1 
1*4 
3-5 
6-4 
2*6 
99*9 
67*0 
•8 
14-9 
4*3 
1-6 
3-3 
6-1 
3*9 
101*8 
• • • 
66-7 
1-0 
15-8 
•7 
•3 
2*1 
3-9 
71 
2*4 
100*0 
66*4 
1*0 
17-1 
3*8 
1*0 
4-0 
4-5 
2*1 
99*9 
66-0 
•1 
•4 
17-1 
2-1 
3-0 
2-0 
4-6 
4'0 
1*4 
100*7 
2*54 
65-5 
•4 
•2 
•6 
16-5 
1*4 
2-5 
2-5 
4-9 
4*1 
2*0 
100*6 
65-2 
•7 
•2 
1*3 
16-9 
1*6 
1-9 
1*3 
4T 
3 6 
3*0 
99*8 
... 
65-0 
19-5 
2-5 
*3 
•5 
3*7 
61 
2*0 
99*5 
65-0 
1*0 
18-8 
2-4 
21 
4-4 
4-4 
2*2 
100*3 
2*59 
65-0 
•8 
•6 
19-4 
1-8 
ri 
•5 
31 
6-3 
1*7 
100*3 
64-0 
17-6 
4-2 
1-3 
4-4 
4-8 
2*6 
98*9 
64-0 
•5 
19-1 
2*4 
1-9 
1-1 
4-6 
4-2 
1*9 
99*6 
63*5 
2-0 
15-3 
3-2 
1*7 
2-5 
4-3 
4-8 
2*8 
100*1 
62-0 
•2 
•3 
1-7 
17-8 
4*4 
2*6 
5-4 
4*3 
1*5 
100*1 
61-4 
*8 
•2 
1-7 
16*6 
2-1 
3-1 
2*7 
6-2 
3-8 
1*3 
100*1 
60-7 
1*4 
14-8 
7-4 
4-9 
8*7 
*4 
98*3 
59-9 
1-0 
4*3 
17*0 
3-6 
1*3 
1*5 
5-9 
3*2 
1*5 
99*2 
2*33 
18 rocks 
64*6 
•2 
•1 
1-0 
17-1 
2-1 
1*8 
s 
1-6 
4*4 
5-0 
2*1 
100*0 
2*49 
±i*4 
± 1*1 
±i-o 
±i-i 
± i-3 
± 5*9 
22 
aba 
b a b 
65-8 
1*2 
18*4 
2-0 
1-5 
1*5 
37 
4-0 
4*1 
102*2 
64-3 
•3 
•2 
1-3 
17-8 
34 
1*3 
2-0 
3-4 
3 8 
2*5 
100*3 
63-7 
•3 
1*2 
17-1 
2-0 
2*7 
2-0 
3-9 
41 
3*1 
100*1 
63-2 
•2 
•5 
17-0 
•2 
6*4 
*9 
4-2 
4*4 
2*9 
100*2 
631 
•6 
18-9 
3*5 
2-0 
2-0 
6-2 
31 
1*3 
100*7 
• • • 
62-9 
*6 
190 
1*0 
3*2 
1*7 
4-3 
3 9 
3*4 
100 *] 
62*9 
•2 
1*0 
18-3 
1*8 
4-0 
1-6 
5*6 
2-9 
1*5 
99*8 
2*46 
62-8 
•4 
•5 
23 
16-2 
3*1 
1*7 
1-5 
4-8 
3*5 
3*1 
99*9 
62-8 
2-7 
18-7 
1*1 
4-4 
2-4 
3-6 
3*6 
1*3 
100*6 
62-7 
•2 
17-2 
3-8 
2*7 
1*8 
5-5 
3*5 
3*0 
100*3 
2 * 7*9 
62-6 
•4 
•3 
2-6 
16-4 
2-5 
2*1 
1*8 
2-9 
4*6 
3*9 
100*1 
62-3 
1*1 
•3 
1-2 
17-3 
3-0 
1*7 
1-1 
3-4 
4*2 
4*5 
100*3 
2*49 
61-6 
•3 
1-6 
18-8 
4-7 
2-0 
6-6 
4*3 
1*5 
101*4 
61-3 
•7 
1*0 
17*7 
6-0 
•3 
2-5 
5-6 
4*3 
1*4 
100*6 
2*44 
61-2 
*7 
18-3 
?2 
3*8 
5*1 
3*1 
2*4 
100*7 
2*61 
60*9 
•3 
•7 
18-1 
2-4 
3-8 
3*5 
5*6 
4*2 
1*0 
100*5 
2*64 
60-6 
2*2 
17-5 
2-8 
2-5 
2-8 
3*8 
3*3 
4*5 
100*0 
2*65 
60-4 
•6 
•3 
1*9 
16-7 
2-3 
32 
2-2 
4-3 
5*2 
2*7 
100*0 
2*68 
60-3 
•1 
2-8 
17-1 
4-7 
1*1 
2-9 
3*5 
5*1 
2*1 
99*7 
2*61 
60-0 
1*6 
16-9 
2-4 
4*8 
3*6 
5*1 
3*9 
1*3 
99*6 
2 * 85 ? 
59-9 
•9 
18*4 
3-7 
3-0 
2*0 
6-6 
3*4 
1*7 
99*6 
2*44 
59-8 
4*1 
18-6 
4*8 
2*9 
4-7 
2*8 
2*7 
100*5 
( 2 * 18 ) 
