138 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . P 2 0 5 . 
H 2 0. 
A1 2 0 3 . 
Fe 2 0 3 . 
FeO. 
MgO. 
CaO. 
Na 2 0. 
K 2 0. 
Total. 
Sp.Gr. 
50 
6 b a 
a a b 
! 
54*1 
7-9 
12-9 
16-6 
6-2 
•4 
1-2 
99-4 
3-30 
50-9 
•1 
13-2 
1*1 
9*7 
131 
10-2 
1-2 
•3 
99-7 
3-10 
50-6 
•8 '3 
•9 
7-9 
1*4 
15-0 
18-6 
3-4 
1*0 
•2 
100-1 
50’0 
11-7 
2-4 
10-6 
12-8 
11*2 
1-6 
•2 
100-6 
49*6 
•2 
5-0 
13-5 
4*7 
10*7 
9-2 
6-2 
1-0 
•4 
100-6 
2-72 
48-1 
4-2 
13-3 
3-7 
9-5 
9*5 
8-5 
2*0 
1-6 
100-4 
2-92 
45-9 
•6 
15*1 
1*9 
11*5 
14-8 
8’9 
1*9 
•2 
100-8 
45-3 
2*5 *4 
*2 
13*4 
73 
6-6 
11*5 
10-3 
2-2 
•2 
99-9 
42*8 
4*0 
8*7 
18-9 
10-1 
123 
2-3 
•6 
100-0 
2-83 
42-8 
6-2 
10*9 
3*4 
101 
16-3 
9*1 
•9 
•1 
99-9 
2-88 
42-4 
•5 -6 
4-4 
13-4 
6*4 
6-5 
11-0 
11*1 
2-8 
•5 
99-6 
2-96 
41-3 
74 
2‘4 
9*4 
15*0 
21-4 
3-3 
99-9 
40-6 
4*2 
(5-0) 
12-5 
5-5 
9-5 
9-0 
10*8 
2-5 
1-2 
100-8 
40-2 
2-9 
3*4 
12-8 
4-0 
10-4 
11-9 
10-4 
2*7 
•8 
99-5 
14 rocks 
46-0 
•8 -1 
2-9 
11*2 
3-7 
11-2 
133 
8-7 
1-6 
•5 
100-1 
2-96 
±2*2 
±2-5 
±2-3 
±1-8 
± 
•9 
±9‘7 
51 
b b a 
aba 
53-6 
13-9 
15-7 
3-4 
8*1 
5*3 
•7 
100-7 
3-02 
51-8 
15-/ 
8-5 
7-3 
5-0 
9-6 
2-2 
1-0 
100-9 
... 
51*1 
10-9 
21-9 
2*4 
10-3 
3*7 
1*6 
102-0 
(2-56) 
51-0 
2*4 
12-8 
17*1 
5-2 
61 
4-2 
1-2 
100-0 
50*6 
1*8 
144 
16-0 
5-1 
9-2 
2-2 
1*0 
100-0 
50-0 
2-0 
14-0 
14-2 
6-0 
io-o 
35 
*3 
100-0 
49-8 
1-3 *6 
2*6 
12-7 
3’4 
11-4 
4-4 
8*7 
5*2 
•6 
100-7 
2*91 
49-3 
1*6 
14-5 
16*1 
5-7 
91 
3*0 
1-2 
100-6 
49*1 
•8 
•8 
13-8 
6-8 
12-6 
3 2 
8-7 
2*5 
1*3 
99-5 
49-1 
•6 *5 
12*0 
6*2 
7*9 
7 '6 
10-6 
3-9 
2*0 
100-4 
(2*33) 
48-4 
1*3 -3 
1*0 
15-5 
4-8 
7-8 
8-2 
8-8 
3-0 
1*0 
100-2 
2-97 
48-3 
1*8 
1*4 
13-9 
9-6 
4*2 
6-8 
9-2 
3-5 
1*0 
99-7 
3-13 
47-5 
2-1 
12-5 
8*1 
7-4 
8*4 
10-1 
3-9 
99-8 
3-02 
46-9 
•9 
1*2 
11-8 
11*7 
4-6 
6-6 
10-7 
3*7 
•4 
98-0 
44-8 
5 3 -3 
(1-2) 
12-5 
1 4-6 
13-2 
5-4 
10-2 
2°5 
1-0 
100-7 
3-09 
43-6 
4-4 
12-3 
3-5 
12-2 
9-1 
11-4 
2-7 
•8 
100-0 
2 
16 rocks 
49-1 
•9 '1 
1-3 
13*3 
6-8 
9*2 
5*8 
9-4 
3 4 
•9 
100-2 
3-02 
±1-3 
±1*1 
±1-5 
±2-2 
± 
•8 
±6-9 
(2-45) 
52 
b b a 
abb 
48-2 
16-1 
36 
12-8 
7-6 
io-o 
2 
2 
98-3 
45-5 
4*3 
16-6 
4*1 
8*8 
9-4 
8-2 
2-2 
•7 
99*8 
2-99 
44-8 
6‘2 
13-5 
11-8 
4-5 
11-6 
4-8 
2*3 
99*5 
(2 ’56) 
