124 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . 
PA- 
h 2 o. 
A1 2 0 3 . 
Fe 2 0 3 
. FeO. 
MgO. CaO. 
Na 2 0. 
k 2 o. 
Total. 
Sp. Gr. 
35 
51-0 
7 
*5 
3-9 
15-6 
8-5 
1-4 
5-2 
6-5 
37 
3*4 
99-8 
507 
1-9 
2-0 
14-8 
35 
9-3 
5*9 
8-2 
2-8 
1-4 
100-5 
2-94 
50-3 
1-3 
•9 
13-6 
10’8 
6-5 
2*3 
77 
4-2 
1-8 
98-8 
2-88 
49-2 
1*8 
1-5 
27 
15-8 
6*1 
7-5 
3*0 
5*3 
5-2 
27 
100-5 
2-79 
49*1 
4*3 
17-2 
•5 
12*2 
3-6 
97 
2-9 
99-9 
46-8 
2-3 
1*0 
5-2 
14-9 
7-8 
5-2 
2-9 
6*4 
5*0 
2-4 
99-9 
17 rocks 
53-2 
7 
•3 
2-1 
15-9. 
6-0 
6-5 
35 
6*5 
38 
1-6 
100-1 
2-88 
±1*8 
±1-1 
±17 
±1-9 
±i-o 
±7-5 
36 
baa 
abb 
58-6 
•6 
22-9 
2-5 
7*0 
4*0 
17 
3-2 
•5 
101-0 
2-85 
58-0 
•4 
22-2 
2-0 
7-2 
3-8 
2-2 
3-2 
7 
997 
2-85 
55*9 
15*1 
15*2 
4*2 
6 '5 
2-5 
•9 
100-0 
55-9 
•8 
•8 
12-6 
6-5 
10-2 
6-2 
3 5 
2-2 
7 
99 4 
55*4 
•8 
1-6 
20-0 
27 
57 
6-6 
36 
3-0 
1-9 
1007 
... 
54-0 
17-0 
12-0 
6-0 
7*0 
2-0 
2-0 
ioo-o 
2-95 
52-3 
•4 
18-4 
5-9 
117 
1-0 
7 3 
2*9 
•5 
997 
51-4 
•1 
7 
18-2 
14-5 
37 
10-3 
•8 
•2 
99-3 
51-3 
5-0 
20*4 
3-0 
47 
7-2 
4-5 
1*8 
2-9 
100-3 
2-84 
50-9 
•5 
•8 
2-0 
17‘5 
14-4 
2*6 
6-9 
3-4 
17 
100-7 
50-0 
2-0 
160 
14-0 
5*0 
8-0 
4-0 
1-0 
100-0 
2-98 
49 '6 
24 
1-2 
15*6 
8-8 
47 
77 
87 
2-2 
17 
100-4 
2-93 
49-3 
*3 
2-9 
16-9 
6-5 
6-9 
4*8 
7*6 
3-4 
7 
99-3 
48-3 
3*9 
18-5 
14*5 
4-5 
5-4 
3*4 
1-8 
100-3 
46-9 
3*2 
1*1 
167 
11-4 
5-6 
3-6 
67 
39 
•8 
99-2 
42-3 
2*9 
•3 
6-0 
16-9 
5-2 
117 
6-9 
33 
4-0 
•8 
99-8 
1 rocks 
51-9 
•6 
•2 
17 
17-8 
6-9 
6-4 
4-8 
5-8 
2-9 
17 
99-9 
2-90 
y 
y 
±2-3 
±2*0 
±2*6 
±2*0 
+ 
•8 
±97 
37 
baa 
baa 
60*5 
•5 
20*4 
1-5 
2*9 
2-9 
6-2 
3-5 
1-3 
99-8 
59*5 
1-8 
20-2 
67 
1*3 
6-8 
2-8 
1*3 
100-4 
58*4 
•2 
19-3 
5*8 
•6 
37 
6-8 
3 8 
2-3 
100-3 
58*3 
*2 
20-8 
2-6 
3-8 
2-6 
8-4 
4-2 
7 
101-6 
2-82 
58-2 
•2 
•3 
1-3 
19-2 
2-0 
4-4 
3*2 
5 '6 
4-5 
1-8 
100*8 
CO. 
57-3 
•4 
(•5) 
24*9 
IT 
•9 
•3 
8'0 
5-4 
1-2 
ioo-o 
57*0 
•2 
•2 
17*5 
4-6 
4*4 
3 2 
8-5 
3*0 
1-2 
99-8 
56-5 
•5 
•1 
7 
18-1 
4-3 
2-8 
4-5 
8-2 
3-2 
17 
100-1 
56*1 
51 
17-2 
4*8 
2 3 
11-2 
2-0 
1-4 
100-2 
56-0 
27-6 
17 
7 
11-9 
3*8 
7 
1017 
55*9 
•2 
27 
22*4 
2-5 
1*8 
3-0 
9-2 
1-8 
•4 
90-8 
(2-27) 
55*5 
1-0 
•5 
7 
16*8 
47 
3-6 
3-0 
77 
4*3 
3-6 
100-2 
279 
554 
7 
*4 
1-1 
20-3 
1*5 
4-4 
1-8 
7-2 
4*3 
2-8 
ioo-o 
53 7 
•9 
•5 
4-9 
170 
5-0 
2-4 
1*8 
10-2 
3 5 
•8 
100-6 
274 
