122 Proceedings of the Poyal Society of Edinburgh, 
[Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . P 2 0 5 . 
h 2 o. 
A1 2 0 3 . 
Fe 2 0 3 . 
FeO. 
MgO. 
CaO. 
Na 2 0. K 2 0. 
Total. 
Sp.Gr. 
33 
53-4 
5T 
11-5 
8-4 
(4-9) 
2-6 
13-2 
•7 
•6 
100-4 
2-74 
51-3 
1*4 
(2-9) 
15-5 
3 2 
7T 
4.4 
9-2 
3-8 
1-2 
100-0 
2-92 
25 rocks 
57-6 
*4 
•2 
1-7 
16T 
4-9 
37 
3*7 
7.4 
v 
3-0 
1-4 
100-1 
2-79 
±1*1 
±1-4 
±1*6 
1 + 
±’•9 
±6-4 
34 
baa 
a a b 
59-7 
2T 
16*2 
1-9 
8-6 
2-7 
4-8 
1-0 
3T 
100-3 
57-4 
•8 
16-9 
2-5 
5-2 
5*5 
7*3 
3 3 
1-9 
100-7 
57-4 
•7 
15*7 
2T 
5-2 
8-8 
4-9 
3T 
1-5 
99-9 
2-83 
56-8 
1-5 
16-7 
3-8 
4-6 
39 
6*4 
3-4 
2-8 
99-9 
2-66 
56-7 
•2 
IT 
18-8 
•2 
7-0 
5*6 
7 3 
2 3 
•8 
ioo-o 
2-88 
56*4 
IT 
2 3 
16*8 
3 3 
7T 
3 5 
5-6 
1-2 
3T 
100-4 
2-63 
56*2 
•3 
1-0 
16T 
4*9 
4-4 
4-6 
7-0 
3-0 
2-4 
99-9 
2-74 
56*0 
*7 
•7 
12-5 
•5 
15*9 
6T 
4-2 
2*0 
•7 
99-3 
55-8 
1-1 
•2 
1*3 
17T 
4T 
3-8 
5T 
7.4 
2-9 
1-7 
100-4 
55*4 
1-2 
16*8 
9-3 
5-2 
7-6 
3-6 
1-4 
100-5 
54-0 
1*3 
13*9 
15*4 
3*8 
9-8 
IT 
•7 
ioo-o 
2-90? 
54-0 
•9 
T 
•7 
16-7 
1*4 
7.7 
5-7 
8-8 
3-0 
■% 
99-7 
53-8 
1*7 
‘3 
1-8 
15-8 
6-9 
43 
5-6 
7.7 
3-0 
•7 
101-5 
2*91 
1 
535 
2-4 
13*4 
16-7 
3T 
10-9 
ioo-o 
I 
52*8 
2-1 
"5 
1-0 
12-5 
9T 
4-0 
4-5 
8T 
2-6 
2*4 
99-6 
52-4 
1-1 
•I 
1-8 
13-6 
2-7 
10T 
5-5 
10-0 
2-3 
•4 
ioo-o 
52-2 
1-4 
•5 
*3 
14-6 
10-8 
3-2 
5-0 
8-7 
1-8 
•6 
99-1 
52-2 
2*1 
T 
IT 
12*2 
10*1 
2-9 
5*5 
7T 
3-8 
2*2 
99-3 
51*3 
1*5 
17-6 
12-0 
5-7 
9-7 
•6 
1-4 
99-8 
2-95 
51-2 
' 2*4 
•3 
1-6 
14T 
4-6 
8-9 
4.4 
8-3 
2-6 
1-3 
99-7 
2-98 
50*7 
2-8 
2-0 
14T 
8-3 
4-6 
6-6 
7.7 
2-7 
1-2 
100-7 
49’8 
3-0 
1-4 
14T 
14-9 
T 
5-6 
9-4 
1-7 
ioo-o 
49-6 
2*3 
•3 
3-6 
15T 
1-7 
8-8 
5-4 
7 3 
4-2 
•9 
100-3 
) 
49-0 
2-8 
3*3 
15-3 
2-6 
8-2 
4-9 
8-2 
2-5 
2-6 
99-4 
24 rocks 
53-9 
•9 
•3 
1-5 
15-3 
5-0 
6-4 
5T 
7.7 
2*4 
1-5 
1000 
2-83 
S 
±1 : 6 
±1*5 
±2-4 
±1-3 
±1*2 
±8-0 
35 
baa 
aba 
57-2 
16T 
13-0 
2-2 
5-8 
3-9 
1*8 
ioo-o 
2-80 
57-0 
•3 
T 
2-3 
14-6 
9*2 
4-9 
1-6 
4-6 
4-9 
•8 
100-3 
2-90 
56-8 
1-4 
•4 
•4 
14-3 
5-8 
9-5 
1-6 
5-3 
3-4 
1-7 
100-6 
3-02 
56-7 
•7 
16-9 
4T 
6 3 
4-6 
7*2 
4-6 
•6 
101-7 
562 
2-2 
IT 
•8 
15-5 
1-5 
9-9 
1-8 
5*4 
2-8 
2-8 
ioo-o 
55-8 
2-4 
16-0 
12-5 
2*2 
7T 
2-2 
1-9 
lOOT 
2*7*0 
55-7 
2-3 
17-5 
5-2 
4.7 
2*9 
6-7 
2 '4 
2T 
99-5 
' 
53-8 
3*3 
18-4 
8-3 
5-6 
3-2 
7*0 
1-2 
100-8 
53*7 
1*6 
18-2 
10-6 
5-2 
6-7 
2-7 
1*0 
99-6 
52-5 
1-3 
•3 
1-2 
15-5 
5T 
9*8 
2*6 
7 3 
3 3 
1-8 
100-5 
2*83 
52*4 
•2 
2-3 
15T 
2*3 
10T 
5*4 
7 3 
4-0 
•9 
ioo-o 
2-97 
