140 
Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group . 
Si 0 2 . 
Ti 0 2 . 
P 2 0 5 . 
H 2 0. 
A 1 2 O s . 
Fe 2 0 3 . 
FeO . 
MgO . 
CaO . 
Na 2 0. K 2 0. 
Total . 
Sp . Gr . 
52 
43-1 
1*7 
4-5 
15-7 
12-9 
2-9 
7-1 
10*9 
1-0 
•4 
100-3 
42-9 
10-0 
14-9 
17-6 
8*6 
1-3 
4-7 
ioo-o 
2-90 
40*2 
4-7 
•5 
9-5 
9-7 
13-0 
8-0 
13-1 
*8 
•2 
99-7 
3-36 
37*9 
5-3 
1*4 
13-2 
8-8 
8-4 
9*5 
10-8 
2-4 
2-1 
99-8 
35-0 
5*2 
1-3 
10-8 
1-4 
21*3 
19-3 
•4 
•2 
5-4 
100-3 
3*28 
8 rocks 
42-2 
21 
2 3 
13-2 
8-4 
11*2 
101 
7-4 
1-7 
1-1 
99-7 
3 T 3 
o 
► CO 
+1 
±2-3 
±4-8 
±2-2 
±1-6 
±13-9 
(2-56) 
53 
b b a 
baa 
51*5 
1-1 
•2 
14-0 
2-7 
8-9 
7*6 
10*5 
4 : 7 
101 -i 
51-4 
•9 
1*9 
13-7 
4-4 
6*1 
6-4 
11*6 
3-9 
•6 
100-8 
50-3 
1*6 
•2 
•3 
15-2 
2*8 
11-3 
5-8 
9*6 
2-9 
1-0 
101-1 
2-97 
49-6 
1-3 
11-9 
2-6 
9-2 
8*0 
12-8 
1*1 
36 
100-1 
2-88 
49-2 
1-1 
2-2 
14-4 
4-5 
4-6 
8-2 
10-2 
4-5 
•4 
99-4 
49-2 
•2 
•4 
•9 
15*0 
1-4 
9-0 
8-0 
13-6 
1*1 
1-5 
100-4 
49-0 
3*0 
14-0 
12-0 
6-0 
10*0 
4-0 
2-0 
ioo-o 
2-98 
48-4 
•4 
3*0 
13-4 
9-2 
4-6 
4-3 
12*8 
3*2 
1-0 
100-3 
48-0 
3-0 
16-8 
4-3 
4-2 
9*1 
13-3 
1*2 
•3 
100-2 
47*0 
•1 
4-9 
171 
1-9 
7-0 
8-3 
12-2 
2*5 
•5 
101-4 
3*20 
46*9 
2*0 
13-4 
9-8 
2-7 
4-3 
14*7 
4-6 
2-0 
100-4 
45-6 
1-3 
•9 
3-9 
13-0 
5-0 
4-8 
8-4 
11-3 
4-5 
1-0 
99-9 
44*1 
1-4 
6-8 
14-0 
91 
4*4 
4-9 
11-6 
3*3 
1-1 
100-6 
... 
43-9 
1*8 
T 
3*4 
17*6 
4-0 
3 9 
8*2 
131 
2-8 
1*3 
100-1 
43-8 
3*6 
3*1 
12-8 
9-0 
5 T 
2*4 
13-6 
3-6 
2-9 
99-8 
2-86 
43-7 
4-0 
1*0 
11*5 
63 
8-0 
7-9 
14-0 
2*3 
1-5 
100-2 
42-0 
3*7 
•6 
1-1 
13-6 
7-6 
7-1 
6-4 
14-2 
1-9 
1-0 
99-2 
40*6 
3 T 
1*6 
6‘6 
13-0 
4*7 
6*7 
5-2 
13-6 
3-0 
2-2 
100-3 
2*86 
40-2 
4*7 
1-1 
3-4 
12 T 
7-0 
6*9 
6-6 
13*3 
3-6 
1-6 
100-7 
2-92 
19 rocks 
46*5 
1*6 
•3 
2-6 
14*0 
5-4 
6-3 
6-6 
12-4 
3-0 
1*5 
100-3 
2-95 
±1-4 
±1-2 
±i-8 
±i-8 
±i-o 
±7-2 
54 
b b a 
b a b 
48-6 
1-7 
15*9 
2-5 
6-3 
11-5 
11-7 
2-0 
100-2 
47-5 
2-8 
•9 
16-7 
6-7 
6-9 
6-4 
8-7 
2-8 
1*1 
100-5 
47-3 
•9 
15-2 
1-2 
10-7 
9-9 
11-3 
3*0 
99-6 
... || 
47*1 
1*2 
•9 
16-0 
4-0 
9*9 
4-9 
13 3 
11 
2-0 
100-4 
... 
46*7 
17-7 
1*7 
11*3 
10-4 
11*6 
1*8 
•2 
101-5 
... 
46*2 
1-6 
13-4 
8-2 
7-0 
7 3 
12-3 
3-0 
•6 
99-9 
3-01 
45-1 
2-2 
181 
12-9 
7-3 
11*2 
2 T 
1-0 
ioo-o 
44-2 
1*5 
2-5 
14-7 
6-8 
4*8 
9*5 
10-4 
3-0 
1-8 
99-2 
2-90 % 
42*7 
2*5 
18-4 
5-3 
7'0 
12-9 
10-1 
1-7 
•5 
101-0 
• • • 
42-2 
1*9 
•9 
1*0 
17-4 
5*9 
6-6 
11-0 
12*6 
1*1 
•9 
101-5 
42-0 
1-9 
T 
3-2 
13-9 
5*8 
6-2 
10-4 
11*4 
3-6 
•9 
101-3 
3-03 
