144 
Group. 
56 
15 rocks 
57 
7 rocks 
58 
10 rocks 
59 
Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Si0 9 . 
38-6 
38*1 
36*4 
42-2 
51-9 
50-8 
49-4 
45-0 
42-8 
41-5 
38-6 
457 
45*7 
43*8 
43-2 
42-8 
42-0 
41-5 
41-4 
40-0 
39*9 
39-2 
42-0 
46-8 
464 
43-7 
42-9 
41-4 
40*8 
40-4 
404 
39-9 
39-6 
Ti0 2 . P 2 0 5 . 
h 2 o . 
A1 2 0 3 . 
Fe 2 O s . 
FeO. 
MgO. 
CaO. 
Na 2 0. K 2 0. 
Total. 
Sp.Gr. 
1*3 
20-4 
7-6 
5-9 
12-9 
9-4 
2*3 
1*4 
99-8 
5*5 
17-9 
14T 
8-9 
11-7 
1-0 
2-0 
99*3 
21 1*1 
•8 
16-1 
12-9 
6-9 
5-0 
15*5 
2-4 
IT 
100-3 
•2 
•1 
1*8 
17*9 
8*3 
8T 
/ 
6-7 
10-8 
2*8 
1-3 
100-3 
3-08 
±3-0 
±1-4 
±2-0 
±2-6 
±1*9 
±10-9 
a a a 
3-0 
2-5 
3*5 
9-4 
26-0 
3'6 
100-1 
•7 
3-4 
1*7 
8-3 
22-8 
12*3 
ioo-o 
3*32 
2-6 
3-4 
1-3 
5-9 
35-0 
2T 
99*7 
1-0 
‘1 
38 
63 
3-4 
8-3 
21-0 
8-8 
•9 
•7 
99-2 
33 
7-5 
33 
4-8 
30T 
6-5 
•5 
T 
98*9 
2-95 ? 
•2 
*2 
4-7 
3-6 
6*3 
8-9 
25-3 
6-6 
*3 
T 
97-5 
6-4 
37 
7*6 
7-8 
27-7 
7*7 
•2 
99-7 
•2 
3*5 
4-3 
3-9 
7*6 
26-8 
6-8 
•2 
•2 
993 
3-25 
±3-0 
±1*4 
±2*6 
±2-6 
±•4 
±io-o 
a a b 
1-2 
6-6 
9T 
34*8 
2T 
99-5 
3-10? 
1*1 
IT 
9-2 
•6 
44*3 
1-7 
101-4 
3-29 
•8 
2-4 
4-5 
4-6 
38-8 
2*7 
23 
•6 
99-9 
•6 
•o 
9-4 
473 
100-1 
3-30 
1*7 
4-4 
2-8 
4-4 
41 T 
33 
1*2 
•3 
101-2 
*3 
6-9 
2-2 
6-7 
35-9 
58 
1-4 
*3 
101-0 
4-4 
■8 
2-5 
6-4 
43-7 
•6 
99-8 
2*1 
3-6 
8-6 
41-3 
4-2 
99-6 
3-25 
•2 
(•3) 
3*8 
15-3 
40-5 
1-0 
101-0 
•4 
(•4) 
*4 
16-4 
43*8 
1-2 
101-8 
1-3 
2-6 
3*0 
7-7 
^ 
41*2 
23 
S 
•5 
T 
y 
100-5 
3-20 
±i-8 
±2-2 
±2-9 
±2*4 
±•8 
±10-1 
aba 
•7 
9-8 
16-3 
18T 
9-6 
101*3 
3-33 
3*9 
10*8 
5-9 
5-6 
22*2 
3*7 
•3 
1*2 
100-2 
2-8 
11*2 
3-9 
6T 
25-6 
7T 
•5 
•3 
101-2 
61 
109 
3 5 
10T 
16-3 
9T 
*9 
•2 
ioo-o 
2-88 
5"6 
6-6 
139 
63 
18-4 
7-2 
•2 
•9 
100-6 
2-82 
4-1 
10-4 
3-5 
6-4 
23 3 
8*5 
1-7 
•7 
99-1 
2-96 
5-0 
9-9 
4-8 
8-3 
21-6 
4*7 
3*6 
•8 
99T 
3T1 
•4 
•2 
4-0 
7-8 
7-4 
8*7 
23*7 
6-5 
1-2 
•5 
100-6 
2-99 
2-7 
•5 
1*9 
8-7 
4-4 
8-3 
20-2 
10-8 
1*9 
1-0 
100-3 
3-20 
1-0 
5-7 
7*3 
4-4 
10-5 
24*8 
4-8 
1-0 
•3 
99-4 
2-89 
