130 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 o . 
Total. 
Sp. Gr. 
41 
49-6 
•7 
6-0 
•4 
9-6 
5-6 
5*2 
1-3 
13-9 
4-9 
32 
100-3 
... 
48-4 
•5 
*4 
3*8 
133 
4-4 
3-4 
8*4 
10*5 
34 
3*0 
100*0 
... 
21 rocks 
54-1 
•5 
•6 
1-9 
14-2 
32 
4*7 
7-1 
8-7 
31 
2-1 
100*3 
2-79 
y 
v 
y 
±1-4 
±2-2 
±i-4 
±i-4 
± 
•9 
±73 
42 
b a b 
a a b 
57-3 
•4 
•2 
14-7 
1*2 
4-4 
7-8 
6-9 
1-3 
6-4 
100-6 
55-5 
*2 
•4 
15-4 
1-3 
4 '5 
7-9 
6*7 
1-8 
6-6 
100-2 
2-70 
55-0 
*6 
15*7 
4-8 
5*8 
6-2 
11-2 
1*2 
1*5 
102T 
2-84 
54*5 
1-1 
•1 
16*5 
1-0 
5-7 
8*6 
8-0 
2-1 
3*3 
100-9 
54*4 
5-5 
12-9 
7*1 
12-8 
5-1 
21 
•4 
100-2 
54*1 
1-5 
15-0 
4*1 
5-1 
7*3 
7-7 
2-0 
3-5 
100-3 
544 
1*2 
•6 
16-4 
1*7 
5 3 
8-4 
8*1 
2-2 
3*3 
101-3 
53-2 
1-6 
16-2 
10-3 
6-7 
10-1 
1-9 
•4 
100-4 
534 
•7 
15-6 
2-3 
8-2 
5-8 
11*7 
1-9 
1*8 
101-2 
( 2*5*6) 
52*7 
1-6 
14-1 
1-9 
10-2 
6-4 
9-4 
2-6 
•9 
99-8 
2-97 
52-3 
•6 
•5 
2-9 
14-0 
2-8 
4-6 
8-2 
7-4 
2-8 
3-9 
100-2 
52-2 
•4 
•1 
1-4 
14-7 
4-1 
7-7 
9-4 
8-4 
1*5 
•3 
100-2 
52-2 
2-2 
15-4 
4*3 
5*1 
8-9 
8-6 
2*1 
•6 
99-3 
2-85 
51-9 
1-0 
15-5 
12-9 
4-0 
13-8 
•5 
1-2 
100-8 
2-96 
51-7 
1*2 
•2 
•3 
15-2 
24 
8-5 
8-2 
8-7 
2*3 
1*8 
100-2 
51-5 
3-5 
14-4 
3-9 
5-3 
9-5 
9-1 
2-9 
•2 
100-3 
50-4 
1*5 
•5 
2-3 
12-3 
5-7 
3-2 
8*7 
7*1 
1-0 
7*5 
100-4 
2-8*8 
50-0 
1*4 
1-0 
•8 
12-3 
2-9 
5-8 
9-2 
10-2 
2*2 
5-0 
100-0 
49-8 
27 
•7 
4-0 
15-3 
7*7 
6-6 
7-2 
2-7 
4-4 
101-1 
• . . 
49-5 
•8 
2*3 
16-8 
2-0 
6-6 
93 
11*2 
1*6 
100-0 
48-2 
1-0 
•1 
2-7 
18-3 
1-3 
61 
10-8 
9*4 
1-3 
•7 
99-9 
46-0 
•6 
1-1 
2-9 
12-2 
3-9 
4-6 
10-4 
9-5 
2-4 
5-8 
99-8 
22 rocks 
52-3 
•6 
•2 
1*8 
15*0 
3*1 
5-8 
©q 
00 
J 
00 
l 56 
1*9 
2-7 
100-4 
2-90 
±1*6 
±1-2 
±1-1 
x 
±1-5 
±2*2 
±7-6 
(2-56) 
43 
b a b 
aba 
54-4 
’3 
•3 
1-2 
14*3 
6-3 
4-2 
5*9 
7-5 
3*4 
2-2 
100-0 
52-8 
•3 
*4 
•9 
13*3 
2-4 
8*7 
6*8 
8*5 
4-7 
1*5 
100-4 
2*93 
52-6 
1-1 
•3 
1-2 
15-0 
4-4 
5-8 
y 
3-9 
7*8 
3-8 
4-0 
99-9 
52-0 
2-0 
14-0 
130 
3-0 
8-0 
3-0 
5-0 
100-0 
(2-65) 
51-6 
1*2 
1-6 
14-8 
5-3 
7-0 
6-3 
84 
3*3 
1-3 
100-4 
2-92 
: 
51-2 
1-0 
•5 
2-9 
16-1 
4-1 
4*7 
4-8 
7-9 
3*0 
35 
99*9 
51-0 
1*1 
1*3 
15*2 
8-7 
3-4 
y 
4*7 
11-4 
2-4 
1-1 
100-4 
2*9*2 
50 '9 
•6 
•2 
15-7 
10-9 
6-0 
11-8 
2-0 
1*6 
99-6 
3-01 
50-3 
1*0 
•5 
3-8 
15*9 
8-2 
1-5 
4-7 
7*9 
3-0 
3*5 
100-3 
, ... 
50-2 
1*1 
2-4 
16-0 
5-1 
5-8 
5-6 
10-9 
3-4 
•5 
100-8 
49*5 
2-9 
•9 
14*1 
6*1 
6-2 
6‘6 
9-4 
2-3 
2-1 
100-1 
• •• 
49-5 
4-8 
18-0 
5-1 
3-0 
6-2 
7-8 
2-5 
2-3 
99-1 
• •• 
49*3 
•4 
•2 
2*9 
17-4 
2*7 
8*3 
4*7 
8-4 
4*0 
1*8 
100-4 
... 
