120 Proceedings of the Royal Society of Edinburgh. [Sess. 
■ 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . 
PA- 
H 2 0. 
A1 2 0 3 . 
Fe 2 0 3 . 
FeO. 
MgO. 
CaO. 
Na 2 0. 
K 2 0. 
Total. 
Sp. Gr. 
32 
abb 
b b b 
56-5 
•3 
•1 
1*8 
204 
1-3 
4-5 
•6 
2T 
5*6 
7-1 
100-4 
56T 
1-2 
20T 
3*8 
*8 
2-5 
7*5 
8-8 
100-8 
56-0 
•7 
22-2 
1-1 
3 '3 
1*1 
2-4 
8-4 
5*0 
100-2 
55-4 
19-8 
9 '5 
3*9 
6*0 
5*3 
99-9 
55-1 
1-2 
19-2 
6-9 
1-2 
3-7 
2-7 
10-8 
100-8 
2-50 
V ^ S 
54-9 
•6 
16-5 
10-0 
•7 
4-0 
7-0 
6*3 
100-0 
54-8 
•3 
23-5 
5-0 
•6 
F7 
9-0 
54 
100-0 
2-59 
53-8 
1*5 
19-7 
6-2 
3*6 
•9 
1-7 
7-8 
4-6 
99-8 
53-8 
1-7 
23-2 
1-3 
3*2 
•2 
3-0 
7*0 
7*0 
100-3 
53-7 
•1 
2-2 
20*4 
3*7 
2*6 
•5 
2-7 
7-9 
6*1 
99-9 
53*7 
•4 
•9 
18-4 
5-9 
3*3 
*9 
2*1 
9-5 
4-9 
100-0 
52-9 
•5 
•9 
1-2 
19-5 
4*8 
2*5 
•3 
2-6 
7-1 
7-9 
100-2 
52-8 
3-6 
22-6 
3-6 
•2 
1-8 
8*1 
7-1 
99-7 
52-3 
*6 
•7 
22*2 
2-4 
2-5 
1-0 
1-5 
9-8 
6-1 
99-2 
51*9 
•2 
•1 
2-4 
20-3 
3-6 
1-2 
•2 
1-8 
8*5 
9-8 
100-0 
51-0 
•5 
1-4 
197 
7-8 
•4 
4-4 
7-7 
6-8 
100-0 
46*5 
1-2 
•2 
3-7 
19-0 
4-7 
2-3 
2-5 
4*4 
8-5 
6-8 
99-9 
2-58 
17 rocks 
53*6 
•2 
•1 
1*5 
20-4 
3-8 
2-7 
*7 
2*7 
7*5 
6-8 
100-1 
2-56 
±1*1 
±1-4 
±1-8 
+ 
•9 
±1*2 
±6*4 
33 
baa 
a a a 
61*4 
•2 
19-4 
•6 
53 
33 
6-6 
2*8 
•4 
99-8 
2-79 
61*1 
•7 
15*4 
8’0 
3*6 
7*1 
2-7 
1-4 
99-9 
2-66 
59-9 
*2 
•2 
•4 
17-1 
7-5 
•5 
4-0 
5-1 
31 
1-7 
99-8 
2-75 
59-8 
•3 
•5 
•7 
18-7 
3-0 
4-3 
2*8 
6*7 
23 
1-4 
100-4 
59-6 
•2 
•4 
164 
6-3 
4-8 
31 
6-3 
3-1 
•8 
100-7 
59'6 
1-9 
20-4 
5*9 
3*7 
6-8 
1-5 
1-3 
100-9 
59-3 
16-8 
4-0 
4-8 
3*8 
6-9 
2-6 
1-9 
100-0 
2-77 
58-6 
•2 
•1 
3*6 
16-8 
3-0 
4-5 
2-1 
7-7 
32 
1-2 
1010 
2-81 
58-4 
•3 
16-7 
7-2 
4-8 
6*8 
4-7 
1-2 
100-1 
• . • 
58-4 
11 
17*1 
•8 
4-6 
5-2 
7-6 
4-2 
1-0 
1000 
2-94 
<4 
58-3 
164 
4-5 
4-8 
2-7 
11-0 
1-7 
•9 
100-0 
2-84 
58-2 
•8 
14-9 
8 '3 
3-0 
8-0 
3 3 
3-5 
ioo-o 
... 
58T 
•7 
•2 
24 
15-5 
1-7 
5-2 
4-8 
7*0 
2-9 
2*1 
100-3 
V . 
581 
1-5 
13*2 
104 
45 
7-0 
2-6 
1-6 
98-6 
2-77 
57-6 
•8 
•8 
14-7 
8-6 
5-0 
7-5 
3*5 
1-9 
100-3 
57*6 
•2 
1-8 
14*2 
6-0 
4-2 
4-2 
6-9 
3*0 
IT 
99-1 
2 : 77 
57-5 
1-1 
•2 
2-0 
17-2 
43 
3-0 
3-4 
6-5 
3-9 
1*3 
100-2 
... 
57 '4 
1-0 
•2 
1-3 
17*7 
2-2 
5*2 
3 4 
6-8 
31 
1-8 
100-3 
• • • 
56-9 
1-1 
•2 
2 3 
15-5 
2 3 
5-0 
5-7 
5-8 
2-5 
2-7 
100-2 
2-79 
56-2 
3-0 
16-5 
10*6 
2-2 
7-0 
2-9 
•8 
99-2 
557 
*8 
4*2 
164 
10-9 
2*9 
5-9 
3 8 
•5 
100-8 
54*3 
3 '3 
‘1 
•5 
13*2 
3 3 
8*8 
4-8 
8-8 
3-5 
•2 
100-8 
• • • 
54-2 
1-6 
•4 
3-8 
16-3 
54 
3 5 
3 0 
6*3 
4-0 
2-0 
100-2 
2-66 
