118 
Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . P 2 O s . 
h 2 o . 
ai 2 o 3 . 
Fe 2 0 3 . FeO. 
MgO. CaO. 
Na 2 0. 
k 2 o . 
Total. I 
Isp.Gr. 
29 
55-9 
•2 
3 7 
20-4 
2-2 1-6 
•6 
2-2 
8-4 
4*8 
100-0 
2-45 
53-4 
1-3 -1 
4 ’4 
18-2 
2*2 3-4 
1*0 
3-7 
8-4 
3-9 
100-0 
2-49 
15 rocks 
58-2 
•2 -1 
2-2 
19-5 
2-2 1*8 
•8 
2-4 
8-1 
4-6 
100-1 
2-53 
±i-i 
±•9 
1+ 
<±>" 
±1*1 
±’ro 
±5-0 
30 
abb 
b a b 
60-0 
•1 
•6 
20-8 
4-0 *8 
•8 
2-6 
6-0 
5-5 
101-1 
2-66 
59*5 
•6 
18-9 
5*3 
1-5 
1-9 
5-1 
7-2 
100-0 
2-60 
52-9 
1*4 
20-0 
4-7 
1*1 
2-4 
5-5 
5-8 
100-0 
2-52 
' 
59-2 
1-1 
18 6 
6-1 
1-1 
3-0 
4-9 
6-7 
100-6 
2-55 
57-5 
•6 *2 
1-2 
15-4 
4-9 -9 
1-4 
34 
5-5 
9-4 
100-4 
57-2 
•3 -1 
2-1 
18-5 
37 1'2 
*7 
2-8 
4-5 
8-6 
100-2 
56*8 
•5 
2-5 
1 9*7 
2-2 3-7 
•4 
2-2 
43 
7U 
99-4 
56-8 
1-2 
•2 
18-4 
2-2 3-0 
2-0 
4-7 
4-9 
59 
99-4 
56*3 
•7 -5 
(•4) 
20-4 
2-8 3*5 
1-5 
3*8 
6-0 
4-1 
100-0 
56-3 
•6 
*8 
20-5 
1*8 4-2 
2-5 
3-6 
5*9 
4-8 
101-2 
54*6 
1-4 -7 
*7 
194 
2 4 3*3 
2-0 
3-2 
7*7 
4*8 
99-8 
53-8 
38 
19*7 
4-8 
1-9 
3*2 
6-0 
8-0 
101-2 
2-55 1 
53-8 
•3 -5 
4*4 
18*5 
6-2 -7 
1-1 
2*5 
7-1 
5-5 
100-2 
13 rocks 
57*0 
•4 -2 
1*5 
191 
3*1 2*5 
1-4 
3-0 
5-6 
6 4 
100-2 
2-58 
j 
j 
±ri 
±1*1 
±•6 
±1-0 
±1-1 
±4-9 
31 
a b b b b a 
58-7 
1-8 
20-9 
4-2 
•2 
•4 
9-7 
4-2 
100-1 
... 
58-6 
•8 
21*8 
1*8 1-8 
•6 
•3 
9-4 
5-2 
100-3 
• • • i 
57-8 
1-5 
18-7 
5-8 *4 
1*3 
9-4 
4 - 5 
99-4 
2-64 
56-5 
2-1 
22-3 
2-7 FO 
1-5 
11-1 
2*8 
99-9 
2-54 ; 
56-2 
•3 -1 
1-0 
21-4 
2-0 -7 
•2 
1-5 
10-5 
5-7 
99-9 
2-62 
55-6 
32 
19-7 
5*5 
•9 
1*7 
8-6 
4-9 
100-1 
55-0 
•3 -1 
2*6 
21-7 
2-0 2*2 
•1 
2-1 
9-8 
35 
99-4 
2-51 
54-9 
•4 
2-6 
20*8 
1*3 1*4 
•4 
1-0 
9-0 
73 
99-7 
54-9 
1-4 
1-1 
18-3 
7-8 
1-1 
13 
11-4 
3 2 
100-5 
55-2 
•6 
(3-2) 
23-0 
1-2 
2-7 
10-0 
4-5 
100-4 
54-1 
5-4 
21-7 
3-5 
•4 
•4 
8-9 
4-8 
99-3 
54*1 
•9 
•4 
20-6 
33 23 
•8 
1-9 
9-9 
5-2 
100-5 
54-0 
*6 3 
1-8 
19-4 
4-4 2-3 
1-1 
2*0 
8-8 
5*3 
100-0 
54-0 
1-9 
20-3 
47 -6 
•2 
2-7 
8-6 
6-8 
99-8 
53*4 
4-2 
20-2 
1-6 3*0 
•3 
3 3 
7-9 
6’2 
100-2 
494 
•6 
6-0 
19*5 
2-3 39 
•6 
3-8 
9-3 
4-4 
99-4 
... 
16 rocks 
55-1 
•3 
2-5 
20-6 
0° 
1— 1 
00 
O'! 
•4 
1*7 
9-5 
4-9 
99*9 
2-58 
-> 
±ri 
±M 
± 1*4 
±•9 
+’■ 
7 
±5-2 
