114 
Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group . 
Si 0 2 . 
Ti 0 2 . 
PA - 
H 2 0 . 
A 1 2 0 3 . 
Fe 2 0 3 
. FeO . 
MgO . 
CaO . 
Na 2 0 . K 2 0 . 
Total . 
Sp . Gr . 
25 
62-4 
•3 
18-1 
*5 
3-2 
3-3 
4*9 
4-3 
31 
100-1 
62 T 
•6 
•2 
•2 
17-0 
2-4 
2-7 
3-1 
5-8 
4-1 
1-7 
99-8 
61*7 
•6 
*3 
•7 
15-1 
2-0 
2-3 
3-7 
5-0 
4-4 
4-5 
100-1 
61-6 
•5 
•2 
1*3 
17-0 
1-7 
2-9 
3-7 
63 
3-9 
1-3 
100-4 
61-4 
1-4 
•9 
14-4 
2-8 
4-6 
2-7 
4-3 
4-0 
3-8 
100-2 
60*6 
2-0 
17-0 
29 
2-3 
3-3 
6-4 
3-6 
2-4 
100-4 
2 * 5*9 
60-5 
1-8 
161 
3-0 
35 
3-2 
5-8 
3-9 
1-7 
99-5 
2-77 
60-4 
•2 
2-0 
17-0 
1-5 
3-4 
3-8 
5-4 
3-4 
2-0 
99-1 
2-58 
59-9 
3*4 
15-5 
2-5 
2-0 
3-6 
6-8 
4-5 
1-3 
99-5 
59-6 
•7 
•3 
1-3 
16-0 
1-1 
5-4 
5-0 
5-5 
3-7 
1-1 
99-5 
59-4 
•4 
•2 
•5 
18-5 
1-8 
3'9 
31 
6-4 
4-3 
1-3 
99-8 
59-2 
•6 
•3 
1*5 
18-0 
3*1 
2-5 
1-4 
6-8 
4-0 
2-7 
100-2 
... 
57-9 
•8 
•2 
2-9 
17-2 
5-0 
1*5 
2-8 
6'7 
3-2 
2-3 
100-6 
2-68 
56-9 
•8 
•1 
4*4 
14-9 
2 3 
3-2 
3-8 
8-8 
3-4 
2-2 
100-4 
16 rocks 
60-7 
•4 
•1 
1-6 
16-4 
2-0 
3-2 
31 
5-8 
^ 
4-3 
2-4 
100-1 
2-65 
±ri 
- 1-1 
i-i 
± 1-2 
± 1-4 
= 5=59 
26 
abb 
a a b 
61-9 
1*1 
13-2 
3-6 
2-3 
4-6 
3-5 
2-7 
6-1 
99-0 
60-3 
•1 
1-7 
15-8 
5*4 
•9 
5-1 
4-7 
4-1 
1-8 
99-9 
60-3 
•7 
18-4 
2-5 
2-9 
33 
5-5 
3-0 
3-1 
99-9 
59-9 
1*6 
12-1 
10-6 
5-2 
4-5 
3-8 
1-0 
98-6 
59-8 
•7 
•4 
1-3 
17-3 
3-6 
1-8 
1-2 
3-9 
5-0 
5-1 
100-1 
2 * 7*0 
59*5 
•6 
18-2 
6-5 
6-8 
2-0 
•6 
5-3 
99-5 
59-5 
•9 
•3 
•8 
17-2 
2-1 
4-6 
2-7 
6-6 
3-5 
2-3 
100-2 
59-4 
1-4 
•6 
1-0 
16-7 
2-5 
3-5 
1-8 
4-2 
3-7 
5 0 
100-0 
2 * 6 *] 
58-5 
•7 
•3 
2-2 
16-3 
21 
4-4 
3-7 
3-9 
31 
4-1 
99-5 
58-0 
5'5 
12-5 
7-1 
5-3 
3-8 
3-3 
4-8 
100-2 
2-67 
573 
•7 
2-7 
15*7 
4-5 
3-5 
4-3 
5-4 
4-0 
1-9 
100-0 
56-9 
•8 
•2 
•5 
18-8 
2*1 
4-3 
4-4 
7-5 
3-9 
•8 
100-2 
56*8 
1-1 
•4 
1-4 
169 
3-6 
2-9 
3-4 
66 
3-2 
3-5 
99-9 
2-67 
56-4 
2-1 
1-3 
12-9 
2-4 
3-5 
7-8 
4 T 
1-3 
7-8 
99-6 
56-2 
1*4 
•2 
5-4 
17-2 
2-8 
ro‘ 
4-9 
1-8 
4-3 
4-8 
100-2 
2 - 5*6 
55-6 
•8 
2-9 
10-7 
2-0 
5-8 
4-6 
8-4 
1-5 
7-5 
99-7 
2-67 
. 54-2 
2*7 
1-6 
2 T 
10-2 
3-5 
•7 
6-6 
5*0 
1-2 
11-9 
100-2 
2-70 
50-2 
2-3 
1*9 
3-4 
H *3 
3 3 
1-9 
7'1 
7*4 
1-4 
9-8 
100-0 
2-78 
; 
18 rocks 
57-8 
•8 
•3 
2-0 
15-1 
3 5 
2-8 
4-6 
4-8 
3-0 
5-1 
99-8 
2-67 
y 
y 
y 
± 1*4 
± 2-5 
± 1-0 
± 1-9 
= 5 = 1-9 
= 5 = 8-7 
27 
abb 
aba 
63-0 
•2 
•2 
14-3 
2-8 
5-3 
1-3 
2-7 
4-9 
6-4 
100-9 
2-73 
62-1 
2-0 
18-0 
3-6 
•7 
3-6 
6-5 
4-1 
100-6 
61*0 
1-1 
16-6 
3-6 
3-4 
•1 
3-3 
5-9 
5-2 
100-1 
