116 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks ! 
Group . 
Si0 2 . 
Ti0 2 . P 2 0 5 . 
H 2 0 . 
A1 2 0 3 . 
Fe 2 0 
3 - P e O . 
MgO. 
GaO. 
Na 2 0 . 
I 
k 2 o . 
Total . 
Sp . Gr . 
27 
61-0 
•5 
3-1 
18-5 
2-1 
•8 
•9 
1-9 
73 
4-8 
101-3 
2-56 
60-5 
•2 
16-5 
7-9 
1*4 
5-8 
5-0 
2’3 
99-7 
2 - 75 ? 
59-7 
'1 
2-5 
17-0 
3-2 
1-3 
•8 
2 3 
8-4 
4-2 
99-6 
59-2 
•9 
18-8 
4*3 
1\7 
1-9 
6*6 
4-7 
2-0 
100-1 
59*2 
1-3 
13-6 
5-6 
4-0 
1-7 
5-1 
53 
4-6 
100-4 
2-74 
58-8 
•8 
•3 
1-2 
17-5 
2-4 
2*5 
1-0 
2*6 
6*8 
5-9 
100-0 
58-3 
1*0 
•4 
2*5 
19-4 
1-4 
34 
1-3 
5*1 
4-4 
3*8 
100-5 
... 
58-3 
•2 
•1 
2*4 
16-6 
4-1 
3-5 
•4 
1*7 
7 3 
5-5 
100-0 
. .. 
57-4 
2-0 
•6 
1*0 
19-4 
1*7 
2-9 
1-2 
2-7 
6-5 
4-3 
99-7 
12 rocks 
59-9 
•4 
1 
1*5 
17-2 
2-6 
33 
W 
3-6 
6-1 
4-4 
100-2 
2-70 
± 1-2 
± 1-4 
± 1-8 
±1 
‘7 
± 1-7 
± 7-8 
28 
abb 
abb 
' 
60-7 
18-9 
4-4 
2-9 
2-7 
4*1 
5-4 
99T 
... 
59-8 
1*3 
16-8 
7-0 
2-6 
4-4 
2-4 
6-5 
100-8 
2-73 
59-3 
•2 
•3 
•8 
18-6 
4’5 
•3 
■7 
2-6 
4-5 
6-9 
98-7 
... 
58-9 
•4 
1*9 
17-7 
3*9 
2-9 
•5 
1-1 
7*4 
5*6 
100-3 
... 
58*5 
•3 
•2 
1*4 
16-6 
5-7 
2-6 
•6 
2-6 
6-2 
5*4 
100-3 
... 
58-2 
•3 
•6 
*9 
18-3 
4*6 
•3 
•7 
2-5 
4-5 
6-9 
97-7 
58-0 
•9 
•6 
16-9 
3 3 
4-5 
2-0 
3-6 
5T 
5-2 
100-1 
57'9 
•7 
*9 
15-8 
6-8 
•2 
1-7 
30 
6-0 
7*3 
100-2 
2-52 
1 
57-3 
•7 
•5 
2-2 
18-5 
4-4 
1-2 
2-1 
3 6 
4-4 
5-4 
100-3 
53-8 
1*3 
15-2 
71 
4-2 
1*1 
1-7 
10-5 
5-1 
ioo-o 
537 
2*0 
*3 
16-8 
6*6 
2-6 
1-7 
23 
91 
44 
99-4 
53-5 
*9 
1-8 
16-4 
8-7 
1*9 
1-1 
1-5 
io-o 
4-6 
100-3 
52*6 
•8 
•6 
3*6 
16-9 
4-5 
3-2 
37 
5-1 
3*9 
5-2 
lOOT 
52-0 
1-0 
( 5 - 4 ) 
18-1 
2-2 
5-4 
2*8 
4-6 
3-8 
4-7 
ioo-o 
14 rocks 
56-7 
*6 
•2 
1-6 
17-2 
4-8 
2-6 
1-7 
3-0 
5-8 
5*6 
100-2 
2-63 
± 1*7 
±•9 
± 1*6 
± 1-7 
± 1-8 
± 7-7 
29 
abb 
baa 
61-0 
•4 
•1 
1-4 
19-0 
1*8 
1*4 
*7 
4-1 
6-7 
3*5 
100-3 
60-4 
•5 
17-4 
2-0 
1-8 
1-9 
2-8 
7-5 
5-6 
99-9 
60*1 
3-4 
20-5 
1-0 
•7 
1*2 
2*6 
9-6 
IT 
100-2 
59*6 
•8 
18-7 
5*1 
•8 
1-8 
7*0 
5-6 
99-4 
59-0 
•8 
*7 
18-2 
1-6 
37 
1*1 
2-5 
7-0 
5*3 
ioo-o 
58'8 
18-6 
5-0 
1-8 
1-0 
3-8 
7-9 
3T 
ioo-o 
58-7 
•1 
2*6 
19-3 
3*4 
•7 
•8 
1*4 
8-6 
4*5 
ioo-o 
58-6 
•2 
2-9 
19-6 
2-2 
•6 
•4 
1-2 
8-4 
5-3 
99*7 
2-52 
58-5 
•7 * 
2-6 
20-3 
2-4 
•6 
*9 
9-5 
5-2 
ioo-o 
2 - 55 ? 
57-7 
3-1 
20-4 
2-3 
1*5 
•7 
3-2 
7-5 
4-7 
101-8 
2-62 
57-7 
3*2 
20-6 
3*5 
•5 
1*5 
7-0 
6-0 
ioo-o 
2-58 
56-9 
2-5 
21-0 
3-4 
*3 
1*9 
94 
4-7 
99-9 
56-3 
1-0 
*7 
•7 
19-8 
1*9 
2-0 
1-2 
2-6 
8-9 
5-3 
100-4 
