148 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. Iv 2 0. 
Total . 
Sp . Gr . 
62 
38-0 
(4-4) 
•3 
3-1 
9-3 
6-0 
5-9 
17-1 
10*4 
3-5 
2-0 
100-2 
3-07 
36-5 
8-4 
9-9 
6-7 
6-0 
18-1 
10*3 
3 T 
1-6 
100-6 
2-99 
13 . rocks 
42-2 
1*5 
•2 
1-9 
12-0 
4-3 
6*1 
y 
16-6 
12-0 
1-8 
1-6 
' 100-2 
2-95 
±1-9 
±3-0 
±3*4 
±1-9 
±2*1 
±12-3 
63 
b b b 
b b a 
46-3 
•3 
1-1 
14-4 
4*4 
5*8 
12-0 
11*7 
2'4 
1*5 
99-9 
3-45 
464 
1-1 
15 
1-0 
134 
10-6 
12*6 
10-0 
2-6 
2-0 
100-5 
44*2 
1*6 
1/1 
10-2 
9-7 
6-3 
12*0 
11-3 
2-7 
1-1 
100-2 
42-9 
1 
•4 
1*8 
10-9 
4-3 
8-9 
14-0 
13'2 
32 
•6 
100-4 
42-5 
6*5 
12-0 
2-7 
8-3 
12*0 
11-8 
2-7 
2-2 
100-5 
2-91 
42-1 
1-9 
3 
31 
12-2 
2*7 
7-9 
11*5 
11*3 
5-1 
1-1 
99-2 
2-97 
42-0 
•5 
1*0 
10*2 
9-0 
10-6 
9-2 
16-4 
1-3 
•6 
100-8 
41-8 
1*5 
37 
8-1 
12-7 
37 
101 
13-6 
3-6 
1*2 
100-0 
41*8 
24 
2-9 
12*4 
6*3 
4*8 
13-6 
109 
3-4 
1-7 
99-9 
3 : 01 
41-5 
*8 
2-0 
1-5 
14-0 
8-3 
5-3 
7*7 
13-6 
4-0 
1*6 
100-3 
3-05 
41*3 
*7 
•9 
1-6 
8*7 
10-6 
7'5 
11-5 
13-1 
3 -4 
1-1 
100-4 
38-9 
1-6 
*4 
5-2 
15-4 
5-1 
4*7 
5-6 
16*5 
5*3 
1-8 
100-6 
38-0 
3*5 
•3 
1-1 
11-8 
7-8 
6-1 
11-9 
14-5 
3-9 
2-0 
100-9 
36*5 
3-1 
1-4 
102 
8-3 
9'3 
8*2 
18-8 
2-1 
IT 
99-1 
14 rocks 
41-9 
1*3 
•4 
2-4 
117 
7 3 
6*4 
10-9 
13-3 
3 3 
1*4 
100*2 
3-25 
y 
v. 
y 
±1-8 
±1-7 
±2*8 
±1-5 
±1-0 
±8-8 
64 
b b b 
b b b 
44-8 
*5 
2-2 
15-4 
3-4 
6-7 
12-8 
9-8 
3-0 
1-7 
100-3 
2-98 
42-3 
2 - 2 
*3 
2-8 
12*1 
5-0 
6-3 
15-2 
9-8 
2-7 
1-9 
101-6 
3-07 
41-3 
1-2 
1-5 
14*4 
5*4 
9-7 
io-o 
11*5 
4-6 
1-0 
100-6 
41-2 
1*2 
3 '8 
12-4 
63 
8-0 
9*7 
11 T 
2*4 
3 7 
99-8 
40-9 
•7 
•9 
1-4 
10-5 
3-4 
10-4 
14-6 
12*6 
3-2 
IT 
100-0 
3 T 4 
40-7 
1*3 
3 '2 
8-4 
14*3 
6-3 
12-0 
11*4 
2 3 
•8 
100-7 
39*9 
*8 
•5 
io-o 
12-9 
4-1 
14-8 
133 
2-5 
1-8 
100-6 
3-19 
39-0 
3-4 
19-8 
3-0 
4*5 
16-4 
12 T 
•9 
•4 
99-4 
... 
38-0 
2-0 
1-6 
1*6 
14-4 
7-9 
7*0 
10*2 
10-6 
5-2 
1-9 
100-1 
37-8 
■6 
19-9 
3 5 
12-7 
11*0 
14-7 
1*7 
101-8 
36*4 
•4 
1-0 
6*3 
12-9 
8*3 
4-6 
11-4 
14-5 
1-0 
3 0 
99-8 
35-8 
•5 
•7 
1-0 
13-4 
16-8 
4-0 
8-8 
15-0 
3-8 
•7 
100-5 
. . . 
35-6 
8*0 
11-3 
9*3 
6*7 
14*7 
9-0 
39 
1-8 
lOOT 
3-05 
13 rocks 
39-5 
: 1-3 
•5 
2-2 
13-5 
7 '7 
7-0 
y 
12-4 
12-0 
y 
2-9 
1*5 
100-4 
3-06 
±2-2 
±2-6 
±2-7 
±2-2 
±1-2 
±10-9 
